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.

A302315 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 64
2 86
3 336
4 1090
5 3915
6 18990
7 76642
8 360898
9 1695748
10 9408402
11 50431855
12 270054791
13 1483688723
14 8638547369
15 49555516908
16 278416318505
17 1587868618303
18 9269491523649
19 53654294707162
20 306415770314870
21 1762671922872075

List of values

[64, 86, 336, 1090, 3915, 18990, 76642, 360898, 1695748, 9408402, 50431855, 270054791, 1483688723, 8638547369, 49555516908, 278416318505, 1587868618303, 9269491523649, 53654294707162, 306415770314870, 1762671922872075]

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

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