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A202221
Number of permutations avoiding the consecutive pattern 41523.
1
1, 2, 6, 24, 119, 708, 4914, 38976, 347790, 3448212, 37606536, 447426144, 5766888120, 80047243080, 1190459039364, 18884750846976, 318300264871440, 5680496863401840, 107008122578788800, 2121893387875882944, 44179385761361239200, 963649662245743556160
OFFSET
1,2
COMMENTS
a(n) is the number of permutations on [n] that avoid the consecutive pattern 41523. It is the same as the number of permutations which avoid 24153, 31524, 35142, 42513, 25143, 32514 or 34152.
CROSSREFS
KEYWORD
nonn
AUTHOR
Ray Chandler, Dec 15 2011
STATUS
approved