Convolution of A049612 with A011782.

Terms

a(0) =0a(1) =1a(2) =6a(3) =26a(4) =96a(5) =321a(6) =1002a(7) =2972a(8) =8472a(9) =23392a(10) =62912a(11) =165504a(12) =427264a(13) =1085184a(14) =2717184a(15) =6718464a(16) =16427008a(17) =39763968a(18) =95387648a(19) =226951168a(20) =535953408a(21) =1257046016a(22) =2929852416a(23) =6789267456a(24) =15648423936a(25) =35888562176a(26) =81927340032