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.

A269048 Number of n X 4 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.

Table of values

n a(n)
1 60
2 360
3 3078
4 24192
5 183072
6 1350672
7 9779808
8 69793968
9 492374976
10 3441051984
11 23861339424
12 164375084016
13 1125975740544
14 7675458754704
15 52099028628960
16 352309891913520
17 2374503933353280
18 15956129491021776
19 106934858162261664

List of values

[60, 360, 3078, 24192, 183072, 1350672, 9779808, 69793968, 492374976, 3441051984, 23861339424, 164375084016, 1125975740544, 7675458754704, 52099028628960, 352309891913520, 2374503933353280, 15956129491021776, 106934858162261664]

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

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