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.

A222572 Number of nX7 0..2 arrays with no more than floor(nX7/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order.

Table of values

n a(n)
1 17
2 292
3 3999
4 212957
5 4102865
6 278335019
7 7240361264
8 617491399888
9 18298988998017
10 1694595769301401
11 52003776367692101
12 4919456993064095471
13 152349901845469645928
14 14488875201941399981117
15 449914171737778687124896

List of values

[17, 292, 3999, 212957, 4102865, 278335019, 7240361264, 617491399888, 18298988998017, 1694595769301401, 52003776367692101, 4919456993064095471, 152349901845469645928, 14488875201941399981117, 449914171737778687124896]

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

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