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A202217
Number of permutations avoiding the consecutive pattern 45132.
1
1, 2, 6, 24, 119, 708, 4914, 38976, 347776, 3447932, 37601916, 447352224, 5765690544, 80027220448, 1190110692204, 18878422622976, 318180082610048, 5678110761876224, 106958628519952128, 2120821833862388544, 44155198873515034560, 963081167548894179456
OFFSET
1,2
COMMENTS
a(n) is the number of permutations on [n] that avoid the consecutive pattern 45132. It is the same as the number of permutations which avoid 21534, 23154 or 43512.
CROSSREFS
KEYWORD
nonn
AUTHOR
Ray Chandler, Dec 14 2011
STATUS
approved