OFFSET
1,4
LINKS
G. C. Greubel, Rows n = 0..50 of the triangle, flattened
EXAMPLE
Triangle begins as:
1;
-1, 1;
-3, 0, 1;
-1, -3, 0, 1;
5, -6, -2, 0, 1;
13, -4, -5, -2, 0, 1;
27, 1, -7, -4, -2, 0, 1;
41, 12, -4, -6, -4, -2, 0, 1;
43, 35, 4, -6, -5, -4, -2, 0, 1;
25, 72, 18, 0, -5, -5, -4, -2, 0, 1;
-23, 128, 40, 11, -2, -4, -5, -4, -2, 0, 1;
MATHEMATICA
b[n_, l_, k_]:= b[n, l, k]= If[n==0, 1, Sum[If[i==l, 0, Sum[b[n-i*j, i, k], {j, Min[k, n/i]}]], {i, n}]];
t[n_, k_]:= b[n, 0, k] - b[n, 0, k-1]; (* t = A091613 *)
M:= With[{p = 16}, Table[t[n, k], {n, p}, {k, p}]];
T:= Inverse[M];
Table[T[[n, k]], {n, 15}, {k, n}]//Flatten (* G. C. Greubel, Nov 27 2021 *)
CROSSREFS
KEYWORD
sign,tabl
AUTHOR
Christian G. Bower, Jan 23 2004
EXTENSIONS
Name corrected by G. C. Greubel, Nov 27 2021
STATUS
approved