A374550 Number of length n inversion sequences avoiding the patterns 120 and 201.

1, 1, 2, 6, 23, 102, 498, 2607, 14386, 82663, 490228, 2981407, 18507513, 116855873, 748427848, 4851982365, 31784721142, 210111119681, 1399977460914, 9393523464391, 63420812374620, 430570197000992, 2937789342516835, 20135022976572246, 138566149670814993

Offset

0,3

Links

Benjamin Testart, Table of n, a(n) for n = 0..350

Benjamin Testart, Completing the enumeration of inversion sequences avoiding one or two patterns of length 3, arXiv:2407.07701 [math.CO], 2024.

Crossrefs

Cf. A263777, A263778, A279559, A279566, A279570, A360052, A374546, A374548.

Sequence in context: A245389 A088929 A356111 * A279573 A174193 A238639

Adjacent sequences: A374547 A374548 A374549 * A374551 A374552 A374553

Keyword

nonn

Author

Benjamin Testart, Jul 17 2024

Status

approved