OFFSET
1,5
LINKS
Wikipedia, Hypergraph
FORMULA
Column k is the logarithmic transform of the inverse binomial transform of c(d) = 2^binomial(d,k).
EXAMPLE
Triangle begins:
1
0, 1
0, 4, 1
0, 38, 11, 1
0, 728, 958, 26, 1
0, 26704, 1042632, 32596, 57, 1
MATHEMATICA
nn=10; Table[SeriesCoefficient[Log[Sum[x^n/n!*Sum[(-1)^(n-d)*Binomial[n, d]*2^Binomial[d, k], {d, 0, n}], {n, 0, nn}]], {x, 0, n}]*n!, {n, nn}, {k, n}]
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gus Wiseman, Jun 18 2018
STATUS
approved