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.

A223981 Number of n X n 0..3 arrays with rows unimodal and columns nondecreasing.

Table of values

n a(n)
1 4
2 100
3 5029
4 358118
5 31831914
6 3322756326
7 392525216516
8 51162688962195
9 7224066705841458
10 1089938030989276020
11 173886286002145386302
12 29095306392044768817550
13 5072863442986308208335738

List of values

[4, 100, 5029, 358118, 31831914, 3322756326, 392525216516, 51162688962195, 7224066705841458, 1089938030989276020, 173886286002145386302, 29095306392044768817550, 5072863442986308208335738]

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

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