a(n) = binomial(n+4,4)*(4*n+5)/5.

Terms

a(0) =1a(1) =9a(2) =39a(3) =119a(4) =294a(5) =630a(6) =1218a(7) =2178a(8) =3663a(9) =5863a(10) =9009a(11) =13377a(12) =19292a(13) =27132a(14) =37332a(15) =50388a(16) =66861a(17) =87381a(18) =112651a(19) =143451a(20) =180642a(21) =225170a(22) =278070a(23) =340470a(24) =413595a(25) =498771a(26) =597429a(27) =711109a(28) =841464a(29) =990264