Square array A(n,k), n >= 0, k >= 1, read by antidiagonals downwards, where column k is the expansion of e.g.f. exp(Sum_{j=1..k} x^j).
A293669
Square array A(n,k), n >= 0, k >= 1, read by antidiagonals downwards, where column k is the expansion of e.g.f. exp(Sum_{j=1..k} x^j).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =3a(9) =1a(10) =1a(11) =1a(12) =3a(13) =7a(14) =1a(15) =1a(16) =1a(17) =3a(18) =13a(19) =25a(20) =1a(21) =1a(22) =1a(23) =3a(24) =13a(25) =49a(26) =81a(27) =1a(28) =1a(29) =1
External references
- oeis: A293669