A224292 Number of permutations of length n avoiding 1234 and containing exactly 1 occurrence of 1243.

0, 0, 0, 1, 10, 71, 444, 2617, 14958, 84063, 467960, 2591265, 14308722, 78911943, 435066228, 2399404345, 13242035030, 73150006271, 404525810928, 2239684086529, 12415205896794, 68905402034311, 382897019146540, 2130255439081721, 11865617032955070

Offset: 1

Author

Brian Nakamura, Apr 03 2013

Keywords

• nonn

Comments

a(n) is also the number of permutations of length n avoiding 1243 and containing exactly 1 occurrence of 1234.

Links

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

Crossrefs

Cf. A006318.

Programs

Maple

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