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A224296 Number of permutations of length n avoiding 12345 and containing exactly 1 occurrence of 12354. 1
0, 0, 0, 0, 1, 18, 219, 2294, 22457, 212994, 1992364, 18553588, 172889838, 1616683912, 15193902185, 143632773054, 1366274116893, 13078787860290, 125984999505040, 1221032658065388, 11904323953163434, 116721427446951748, 1150690705785803998 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

COMMENTS

a(n) is also the number of permutations of length n avoiding 12354 and containing exactly 1 occurrence of 12345.

LINKS

Table of n, a(n) for n=1..23.

B. Nakamura, Approaches for enumerating permutations with a prescribed number of occurrences of patterns, arXiv 1301.5080, 2013.

MAPLE

# Programs can be obtained from author's personal website.

CROSSREFS

Cf. A224295.

Sequence in context: A025470 A046915 A041616 * A019333 A021454 A021224

Adjacent sequences:  A224293 A224294 A224295 * A224297 A224298 A224299

KEYWORD

nonn

AUTHOR

Brian Nakamura, Apr 03 2013

STATUS

approved

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Last modified December 12 17:33 EST 2019. Contains 329960 sequences. (Running on oeis4.)