a(0) = 1, a(n) = (2*n^5 + 20*n^3 + 23*n) * 2/15 for n>=1.

Terms

a(0) =1a(1) =6a(2) =36a(3) =146a(4) =456a(5) =1182a(6) =2668a(7) =5418a(8) =10128a(9) =17718a(10) =29364a(11) =46530a(12) =71000a(13) =104910a(14) =150780a(15) =211546a(16) =290592a(17) =391782a(18) =519492a(19) =678642a(20) =874728a(21) =1113854a(22) =1402764a(23) =1748874a(24) =2160304a(25) =2645910a(26) =3215316a(27) =3878946a(28) =4648056a(29) =5534766