Riordan array (f(x), x*g(x)) where f(x) is the g.f. of A157004 and g(x) is the g.f. of A157003.

Terms

a(0) =1a(1) =2a(2) =1a(3) =6a(4) =3a(5) =1a(6) =18a(7) =10a(8) =4a(9) =1a(10) =58a(11) =32a(12) =15a(13) =5a(14) =1a(15) =192a(16) =106a(17) =52a(18) =21a(19) =6a(20) =1a(21) =650a(22) =357a(23) =180a(24) =79a(25) =28a(26) =7a(27) =1a(28) =2232a(29) =1222