a(n) = 1 + 471*n/140 + 1594*n^2/315 + 73*n^3/16 + 161*n^4/60 + 83*n^5/80 + 61*n^6/240 + n^7/28 + 11*n^8/5040.

A271899

a(n) = 1 + 471*n/140 + 1594*n^2/315 + 73*n^3/16 + 161*n^4/60 + 83*n^5/80 + 61*n^6/240 + n^7/28 + 11*n^8/5040.

Terms

    a(0) =1a(1) =18a(2) =162a(3) =927a(4) =3906a(5) =13248a(6) =38256a(7) =97614a(8) =225819a(9) =482482a(10) =965250a(11) =1827189a(12) =3299556a(13) =5720976a(14) =9574128a(15) =15531132a(16) =24508917a(17) =37735938a(18) =56831698a(19) =83900619a(20) =121641894a(21) =173477040a(22) =243696960a(23) =337630410a(24) =461835855a(25) =624318786a(26) =834776658a(27) =1104873697a(28) =1448547912a(29) =1882352736

External references