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 A289653 Catalan numbers - 2 (A120304) with first four terms changed to 1,1,1,4. 7
 1, 1, 1, 4, 12, 40, 130, 427, 1428, 4860, 16794, 58784, 208010, 742898, 2674438, 9694843, 35357668, 129644788, 477638698, 1767263188, 6564120418, 24466267018, 91482563638, 343059613648, 1289904147322, 4861946401450, 18367353072150, 69533550916002, 263747951750358 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS Related to number of mesh patterns of length 2 that avoid the pattern 321. LINKS Murray Tannock, Equivalence classes of mesh patterns with a dominating pattern, MSc Thesis, Reykjavik Univ., May 2016. See Appendix B2. CROSSREFS A variant of A120304.All of A000108, A001453, A246604, A273526, A120304, A289615, A289616, A289652, A289653, A289654 are very similar sequences. Sequence in context: A152174 A087206 A275863 * A081875 A102433 A221652 Adjacent sequences:  A289650 A289651 A289652 * A289654 A289655 A289656 KEYWORD nonn AUTHOR N. J. A. Sloane, Jul 09 2017 STATUS approved

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Last modified October 22 05:29 EDT 2019. Contains 328315 sequences. (Running on oeis4.)