Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of e.g.f. exp(x)*(sec(x) + tan(x))^k.
A322268
Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of e.g.f. exp(x)*(sec(x) + tan(x))^k.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =3a(8) =4a(9) =1a(10) =1a(11) =4a(12) =9a(13) =9a(14) =1a(15) =1a(16) =5a(17) =16a(18) =29a(19) =24a(20) =1a(21) =1a(22) =6a(23) =25a(24) =67a(25) =105a(26) =77a(27) =1a(28) =1a(29) =7
External references
- oeis: A322268