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A289595
Related to number of mesh patterns of length 2 that avoid the pattern 321.
0
1, 1, 1, 2, 8, 26, 85, 283, 959, 3300, 11505
OFFSET
1,4
LINKS
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
Sequence in context: A060410 A128634 A230904 * A343485 A298189 A053956
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Jul 08 2017
STATUS
approved