cp's OEIS Frontend

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.

A268847 Number of sequences with 4 copies each of 1,2,...,n and longest increasing subsequence of length n.

Table of values

n a(n)
0 1
1 1
2 69
3 31451
4 46922017
5 162588279629
6 1077273394836829
7 12084070123028603391
8 211301962987912098409729
9 5426679072605204732028894233
10 195676681342450229063393365876181
11 9562449832974304724626743446267704131
12 615516610914323638585463757154352054695009

List of values

[1, 1, 69, 31451, 46922017, 162588279629, 1077273394836829, 12084070123028603391, 211301962987912098409729, 5426679072605204732028894233, 195676681342450229063393365876181, 9562449832974304724626743446267704131, 615516610914323638585463757154352054695009]

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

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