a(n) = 3*n^4 + 12*n^3 + 30*n^2 + 36*n + 17.

Terms

a(0) =17a(1) =98a(2) =353a(3) =962a(4) =2177a(5) =4322a(6) =7793a(7) =13058a(8) =20657a(9) =31202a(10) =45377a(11) =63938a(12) =87713a(13) =117602a(14) =154577a(15) =199682a(16) =254033a(17) =318818a(18) =395297a(19) =484802a(20) =588737a(21) =708578a(22) =845873a(23) =1002242a(24) =1179377a(25) =1379042a(26) =1603073a(27) =1853378a(28) =2131937a(29) =2440802