A007318 * triangle M, where M = A002426 * 0^(n-k), 0<=k<=n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =1a(7) =3a(8) =9a(9) =7a(10) =1a(11) =4a(12) =18a(13) =28a(14) =19a(15) =1a(16) =5a(17) =30a(18) =70a(19) =95a(20) =51a(21) =1a(22) =6a(23) =45a(24) =140a(25) =285a(26) =306a(27) =141a(28) =1a(29) =7