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.

A303407 Number of nX5 0..1 arrays with every element equal to 1, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 3
2 27
3 100
4 547
5 4013
6 21361
7 115770
8 803911
9 4667376
10 27684643
11 182192785
12 1120872960
13 6916763577
14 44766799474
15 282088259954
16 1776639929407
17 11435967743483
18 72802740854480
19 463125006110247
20 2975736132751591

List of values

[3, 27, 100, 547, 4013, 21361, 115770, 803911, 4667376, 27684643, 182192785, 1120872960, 6916763577, 44766799474, 282088259954, 1776639929407, 11435967743483, 72802740854480, 463125006110247, 2975736132751591]

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

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