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.

A267977 Number of 3Xn 0..3 arrays with every repeated value in every row greater than or equal to, and in every column greater than, the previous repeated value.

Table of values

n a(n)
1 60
2 3600
3 216000
4 12067722
5 648144348
6 33600202086
7 1691726672094
8 83078866656672
9 3993019853352132
10 188338933978296900
11 8737015871231173194
12 399355062781386269430
13 18013039522804400997948
14 802791844156171633174662

List of values

[60, 3600, 216000, 12067722, 648144348, 33600202086, 1691726672094, 83078866656672, 3993019853352132, 188338933978296900, 8737015871231173194, 399355062781386269430, 18013039522804400997948, 802791844156171633174662]

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

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