Leading term of n-th row of A081491.

Terms

a(0) =1a(1) =2a(2) =4a(3) =9a(4) =19a(5) =36a(6) =62a(7) =99a(8) =149a(9) =214a(10) =296a(11) =397a(12) =519a(13) =664a(14) =834a(15) =1031a(16) =1257a(17) =1514a(18) =1804a(19) =2129a(20) =2491a(21) =2892a(22) =3334a(23) =3819a(24) =4349a(25) =4926a(26) =5552a(27) =6229a(28) =6959a(29) =7744