Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of (B(x)/x)^k, where B(x) is the g.f. of A213639.
A384620
Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of (B(x)/x)^k, where B(x) is the g.f. of A213639.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =1a(4) =1a(5) =0a(6) =1a(7) =2a(8) =5a(9) =0a(10) =1a(11) =3a(12) =11a(13) =38a(14) =0a(15) =1a(16) =4a(17) =18a(18) =86a(19) =357a(20) =0a(21) =1a(22) =5a(23) =26a(24) =145a(25) =815a(26) =3832a(27) =0a(28) =1a(29) =6
External references
- oeis: A384620