W_{4,120}=1 + alpha*y^40 + (208569824191297800 - 40*alpha)*y^42 + (-1092015157737312900 + 780*alpha)*y^44 + (89816907095576551800 - 9880*alpha)*y^46 + (670439468182677286275 + 91390*alpha)*y^48 + (22638005708924478086136 - 658008*alpha)*y^50 + (308689394195193498739980 + 3838380*alpha)*y^52 + (4737554308000356655889160 - 18643560*alpha)*y^54 + (58060061840718191475024570 + 76904685*alpha)*y^56 + (642064997205033235058403360 - 273438880*alpha)*y^58 + (6158790432536913197321650992 + 847660528*alpha)*y^60 + (51922603090246000851989883360 - 2311801440*alpha)*y^62 + (383064674135924956383427504545 + 5586853480*alpha)*y^64 + (2475391756771435140885048132960 - 12033222880*alpha)*y^66 + (13994594568485571756374512847280 + 23206929840*alpha)*y^68 + (69156556945800442095561911971488 - 40225345056*alpha)*y^70 + (298297519744153899494893060438200 + 62852101650*alpha)*y^72 + (1121184814046839859449332407516400 - 88732378800*alpha)*y^74 + (3664502312368671858811623272517960 + 113380261800*alpha)*y^76 + (10389470057071348613511676199550480 - 131282408400*alpha)*y^78 + (25477214280060832954064705017616022 + 137846528820*alpha)*y^80 + (53854275951399986269801355755178640 - 131282408400*alpha)*y^82 + (97744118898992748040476407197797480 + 113380261800*alpha)*y^84 + (151630412727849457120747023626532720 - 88732378800*alpha)*y^86 + (199995284930271979906301221896751260 + 62852101650*alpha)*y^88 + (222916093378501021127118786855450528 - 40225345056*alpha)*y^90 + (208484592540108977833111775667579120 + 23206929840*alpha)*y^92 + (162265976768618329215397115533177440 - 12033222880*alpha)*y^94 + (104085083716964785288425267291837150 + 5586853480*alpha)*y^96 + (54396664859741311899615340564351200 - 2311801440*alpha)*y^98 + (22846599231677516323483417956140784 + 847660528*alpha)*y^100 + (7584485478817845773944616629934880 - 273438880*alpha)*y^102 + (1949932132188104458964088623595960 + 76904685*alpha)*y^104 + (378423486761095081930080576066120 - 18643560*alpha)*y^106 + (53639466153728546119679796223260 + 3838380*alpha)*y^108 + (5314736102353411113739915795512 - 658008*alpha)*y^110 + (346278654453351507376741452135 + 91390*alpha)*y^112 + (13547930679766552401622737720 - 9880*alpha)*y^114 + (274208485019196961132705260 + 780*alpha)*y^116 + (2145047168775813146356680 - 40*alpha)*y^118 + (2703832443259707084858 + alpha)*y^120