A374552 Number of length n inversion sequences avoiding the patterns 000 and 120.

1, 1, 2, 5, 15, 50, 185, 737, 3126, 13976, 65426, 318699, 1607800, 8368088, 44791046, 245903077, 1381505822, 7926881015, 46373681595, 276193339071, 1672469062126, 10284954435831, 64164864206704, 405733694376937, 2598199309906531, 16837017409254863

Offset: 0

Author

Benjamin Testart, Jul 17 2024

Keywords

• nonn

Links

• Benjamin Testart, Table of n, a(n) for n = 0..360
• Benjamin Testart, Completing the enumeration of inversion sequences avoiding one or two patterns of length 3, arXiv:2407.07701 [math.CO], 2024.

Crossrefs

Cf. A000111, A263778, A279552, A279559, A279564, A279570, A374541, A374543.