Triangle T(n, k) = (-1)^(n-k)*StirlingS1(n, k) + (-1)^k*StirlingS1(n, n-k) + (-1)^n*StirlingS1(n, k)*StirlingS1(n, n-k), read by rows.

A155744

Triangle T(n, k) = (-1)^(n-k)*StirlingS1(n, k) + (-1)^k*StirlingS1(n, n-k) + (-1)^n*StirlingS1(n, k)*StirlingS1(n, n-k), read by rows.

Terms

    a(0) =3a(1) =1a(2) =1a(3) =1a(4) =3a(5) =1a(6) =1a(7) =11a(8) =11a(9) =1a(10) =1a(11) =48a(12) =143a(13) =48a(14) =1a(15) =1a(16) =274a(17) =1835a(18) =1835a(19) =274a(20) =1a(21) =1a(22) =1935a(23) =23649a(24) =51075a(25) =23649a(26) =1935a(27) =1a(28) =1a(29) =15861

External references