Row sums of the triangular matrix A190088.

Terms

a(0) =1a(1) =4a(2) =21a(3) =114a(4) =616a(5) =3329a(6) =17991a(7) =97229a(8) =525456a(9) =2839729a(10) =15346786a(11) =82938844a(12) =448227521a(13) =2422362079a(14) =13091204281a(15) =70748973084a(16) =382349636061