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.

A220618 Number of ways to reciprocally link elements of an nX5 array either to themselves or to exactly one horizontal, diagonal and antidiagonal neighbor.

Table of values

n a(n)
1 8
2 317
3 9176
4 282777
5 8608738
6 262680517
7 8011414792
8 244357686173
9 7453056468816
10 227323314349577
11 6933510501158596
12 211476640729594693
13 6450176661330373022
14 196734631145079828705
15 6000535646826871036976

List of values

[8, 317, 9176, 282777, 8608738, 262680517, 8011414792, 244357686173, 7453056468816, 227323314349577, 6933510501158596, 211476640729594693, 6450176661330373022, 196734631145079828705, 6000535646826871036976]

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

Content is available under The OEIS End-User License Agreement.