a(n) = 16*n^4 + 256*n^3 + 1160*n^2 + 1088*n + 285.

Terms

a(0) =285a(1) =2805a(2) =9405a(3) =22197a(4) =43677a(5) =76725a(6) =124605a(7) =190965a(8) =279837a(9) =395637a(10) =543165a(11) =727605a(12) =954525a(13) =1229877a(14) =1559997a(15) =1951605a(16) =2411805a(17) =2948085a(18) =3568317a(19) =4280757a(20) =5094045a(21) =6017205a(22) =7059645a(23) =8231157a(24) =9541917a(25) =11002485a(26) =12623805a(27) =14417205