OFFSET
0,8
COMMENTS
A front is a k-clique.
LINKS
Andrew Gainer-Dewar, Gamma-Species and the Enumeration of k-Trees, Electronic Journal of Combinatorics, Volume 19 (2012), #P45.
EXAMPLE
Triangle begins:
1;
1, 1;
1, 1, 1;
1, 2, 1, 1;
1, 4, 2, 1, 1;
1, 9, 6, 2, 1, 1;
1, 20, 21, 6, 2, 1, 1;
1, 48, 83, 25, 6, 2, 1, 1;
1, 115, 356, 126, 25, 6, 2, 1, 1;
1, 286, 1599, 745, 135, 25, 6, 2, 1, 1;
1, 719, 7434, 4784, 895, 135, 25, 6, 2, 1, 1;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Andrew Howroyd, Mar 01 2024
STATUS
approved