Array read by downward antidiagonals: A(n,k) = -A(n-1,k) + (k+1)*A(n-1,k+1) + A(n-1,k+2) with A(0,k) = 1, n >= 0, k >= 0.
A369292
Array read by downward antidiagonals: A(n,k) = -A(n-1,k) + (k+1)*A(n-1,k+1) + A(n-1,k+2) with A(0,k) = 1, n >= 0, k >= 0.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =4a(6) =1a(7) =3a(8) =8a(9) =18a(10) =1a(11) =4a(12) =14a(13) =42a(14) =108a(15) =1a(16) =5a(17) =22a(18) =84a(19) =276a(20) =780a(21) =1a(22) =6a(23) =32a(24) =150a(25) =612a(26) =2160a(27) =6600a(28) =1a(29) =7
External references
- oeis: A369292