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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A217825 Number of permutations of length 3n with descent set {3, 6, ...} that avoid a certain pattern of length 4 or 5 (see Lewis, 2012, Appendix, for precise definition).

Table of values

n a(n)
1 1
2 19
3 642
4 29777
5 1673048
6 106906200

List of values

[1, 19, 642, 29777, 1673048, 106906200]

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