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.

A201538 Number of nX7 0..2 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor.

Table of values

n a(n)
1 18
2 899
3 72811
4 9526987
5 1408677515
6 208164634003
7 28456420346436
8 3505159734744220
9 387870239576486118
10 38812326822498760643
11 3543738686502556683539
12 297838575975499416278867

List of values

[18, 899, 72811, 9526987, 1408677515, 208164634003, 28456420346436, 3505159734744220, 387870239576486118, 38812326822498760643, 3543738686502556683539, 297838575975499416278867]

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

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