a(n) = 32*n^5 - 32*n^3 + 6*n.

Terms

a(0) =0a(1) =6a(2) =780a(3) =6930a(4) =30744a(5) =96030a(6) =241956a(7) =526890a(8) =1032240a(9) =1866294a(10) =3168060a(11) =5111106a(12) =7907400a(13) =11811150a(14) =17122644a(15) =24192090a(16) =33423456a(17) =45278310a(18) =60279660a(19) =79015794a(20) =102144120a(21) =130395006a(22) =164575620a(23) =205573770a(24) =254361744a(25) =312000150a(26) =379641756a(27) =458535330a(28) =550029480a(29) =655576494