OFFSET
0,12
EXAMPLE
Triangle starts:
[0] 1;
[1] 1;
[2] 1, 0;
[3] 1, 0;
[4] 1, 0, 1;
[5] 1, 0, 3;
[6] 1, 0, 6, 2;
[7] 1, 0, 10, 8;
[8] 1, 0, 15, 20, 9;
[9] 1, 0, 21, 40, 45;
MATHEMATICA
T[n_, k_] := Binomial[n - k, k] * Subfactorial[k];
Table[T[n, k], {n, 0, 9}, {k, 0, n/2}] // MatrixForm
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Peter Luschny, Apr 24 2024
STATUS
approved