A289595 Related to number of mesh patterns of length 2 that avoid the pattern 321.

1, 1, 1, 2, 8, 26, 85, 283, 959, 3300, 11505

Offset

1,4

Links

Table of n, a(n) for n=1..11.

Murray Tannock, Equivalence classes of mesh patterns with a dominating pattern, MSc Thesis, Reykjavik Univ., May 2016. See Appendix B2.

Formula

a(n+4) = A000245(n+2)-A000108(n) (conjectured). - Michael D. Weiner, Jul 24 2020

Crossrefs

Cf. A000108, A000245.

Sequence in context: A060410 A128634 A230904 * A343485 A298189 A053956

Adjacent sequences: A289592 A289593 A289594 * A289596 A289597 A289598

Keyword

nonn,more

Author

N. J. A. Sloane, Jul 08 2017

Status

approved