login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A289652 Catalan numbers - 2 (A120304) with first three terms changed to 1,1,1. 7
1, 1, 1, 3, 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

Table of n, a(n) for n=1..29.

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: A247002 A027991 A120304 * A026071 A102839 A050182

Adjacent sequences:  A289649 A289650 A289651 * A289653 A289654 A289655

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jul 09 2017

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 17 01:34 EDT 2018. Contains 316275 sequences. (Running on oeis4.)