OFFSET
6,1
LINKS
G. A. Kamel, Partial Chain Topologies on Finite Sets, Computational and Applied Mathematics Journal. Vol. 1, No. 4, 2015, pp. 174-179.
EXAMPLE
Triangle begins:
6,
21,42,
56,168,336,
126,504,1512,3024,
252,1260,5040,15120,30240,
...
MATHEMATICA
i = 5; Table[ Table[Binomial[n, i] FactorialPower[n - i, k], {k, 0,
n - i - 1}], {n, 2, 13}] // Grid (* Geoffrey Critzer, Feb 19 2017 *)
CROSSREFS
KEYWORD
AUTHOR
N. J. A. Sloane, Jan 30 2016
EXTENSIONS
Title clarified and more terms added by Geoffrey Critzer, Feb 19 2017
STATUS
approved