OFFSET
1,2
LINKS
M. Josuat-Verges, J.-C. Novelli and J.-Y. Thibon, The algebraic combinatorics of snakes, arXiv preprint arXiv:1110.5272 [math.CO], 2011.
EXAMPLE
Triangle begins:
1
2 3
5 3 0
46 51 54 54
205 159 108 54 0
...
CROSSREFS
KEYWORD
AUTHOR
N. J. A. Sloane, Dec 23 2011
STATUS
approved