OFFSET
0,11
COMMENTS
See Noonan-Zeilberger for precise definition.
LINKS
J. Noonan and D. Zeilberger, [math/9808080] The Enumeration of Permutations With a Prescribed Number of ``Forbidden'' Patterns. Also Adv. in Appl. Math. 17 (1996), no. 4, 381--407. MR1422065 (97j:05003).
EXAMPLE
Triangle begins:
0,
0,0,
0,0,0,
1,1,0,0,
5,5,2,0,0,
21,21,11,3,0,0,
84,84,49,19,4,0,0,
330,330,204,92,29,5,0,0,
1287,1287,825,405,153,41,6,0,0,
5005,5005,3289,1705,715,235,55,7,0,0,
19448,19448,13013,7007,3146,1166,341,71,8,0,0,
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Sep 15 2013
STATUS
approved