a(n) = (n-1)*(2*n-1)*(3*n-1)*(4*n-1).

Terms

a(0) =1a(1) =0a(2) =105a(3) =880a(4) =3465a(5) =9576a(6) =21505a(7) =42120a(8) =74865a(9) =123760a(10) =193401a(11) =288960a(12) =416185a(13) =581400a(14) =791505a(15) =1053976a(16) =1376865a(17) =1768800a(18) =2238985a(19) =2797200a(20) =3453801a(21) =4219720a(22) =5106465a(23) =6126120a(24) =7291345a(25) =8615376a(26) =10112025a(27) =11795680a(28) =13681305a(29) =15784440