Array read by ascending antidiagonals: A(n, k) = (-1)^(n + k) * Sum_{j=0..k} j! * Stirling1(n, j) * Stirling1(k, j).

A379820

Array read by ascending antidiagonals: A(n, k) = (-1)^(n + k) * Sum_{j=0..k} j! * Stirling1(n, j) * Stirling1(k, j).

Terms

    a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =0a(6) =0a(7) =1a(8) =1a(9) =0a(10) =0a(11) =2a(12) =3a(13) =2a(14) =0a(15) =0a(16) =6a(17) =8a(18) =8a(19) =6a(20) =0a(21) =0a(22) =24a(23) =28a(24) =28a(25) =28a(26) =24a(27) =0a(28) =0a(29) =120

External references