6*s*t*(4*s^4 + 3*t^4), where s > 0, t = 1..s.

Terms

a(0) =42a(1) =804a(2) =2688a(3) =5886a(4) =13392a(5) =30618a(6) =24648a(7) =51456a(8) =91224a(9) =172032a(10) =75090a(11) =152880a(12) =246870a(13) =392160a(14) =656250a(15) =186732a(16) =376704a(17) =586116a(18) =857088a(19) =1270620a(20) =1959552a(21) =403494a(22) =810768a(23) =1240722a(24) =1742496a(25) =2410590a(26) =3399984a(27) =4941258a(28) =786576a(29) =1577472