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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.

A259553 Number of distinct (n!)-tuples, with integer entries between 0 and n, inclusive, where entries measure the length of the longest prefix of each of the n! permutations of 123...n that is a subsequence of some string over the alphabet {1,2,3,...n}.

Table of values

n a(n)
1 2
2 6
3 53
4 12034

List of values

[2, 6, 53, 12034]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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