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.

A220601 Number of ways to reciprocally link elements of an nX7 array either to themselves or to exactly two horizontal, vertical and antidiagonal neighbors, without 3-loops.

Table of values

n a(n)
1 1
2 305
3 190425
4 60138423
5 16505365334
6 4807269151250
7 1417058414112748
8 415538772723268712
9 121740835171119793585
10 35681922955520577801844
11 10458840906159008629586152
12 3065510523366853897987776536

List of values

[1, 305, 190425, 60138423, 16505365334, 4807269151250, 1417058414112748, 415538772723268712, 121740835171119793585, 35681922955520577801844, 10458840906159008629586152, 3065510523366853897987776536]

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

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