a(n) = (n + 1)*binomial(n + 1, 10).

Terms

a(0) =10a(1) =121a(2) =792a(3) =3718a(4) =14014a(5) =45045a(6) =128128a(7) =330616a(8) =787644a(9) =1755182a(10) =3695120a(11) =7407036a(12) =14226212a(13) =26313518a(14) =47070144a(15) =81719000a(16) =138105110a(17) =227779695a(18) =367447080a(19) =580870290a(20) =901350450a(21) =1374917115a(22) =2064391680a(23) =3054514320a(24) =4458356760a(25) =6425278860a(26) =9150726816