a(n) = 8*n^4+44*n^3+106*n^2+100*n+30.

Terms

a(0) =0a(1) =30a(2) =288a(3) =1134a(4) =3120a(5) =6990a(6) =13680a(7) =24318a(8) =40224a(9) =62910a(10) =94080a(11) =135630a(12) =189648a(13) =258414a(14) =344400a(15) =450270a(16) =578880a(17) =733278a(18) =916704a(19) =1132590a(20) =1384560a(21) =1676430a(22) =2012208a(23) =2396094a(24) =2832480a(25) =3325950a(26) =3881280a(27) =4503438a(28) =5197584a(29) =5969070