Triangle read by rows: absolute values of odd-numbered rows of A159041.

Terms

a(0) =1a(1) =1a(2) =10a(3) =1a(4) =1a(5) =56a(6) =246a(7) =56a(8) =1a(9) =1a(10) =246a(11) =4047a(12) =11572a(13) =4047a(14) =246a(15) =1a(16) =1a(17) =1012a(18) =46828a(19) =408364a(20) =901990a(21) =408364a(22) =46828a(23) =1012a(24) =1a(25) =1a(26) =4082a(27) =474189a(28) =9713496a(29) =56604978