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.

A269030 Number of n X 3 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two exactly once.

Table of values

n a(n)
1 12
2 48
3 348
4 2136
5 12228
6 67104
7 357756
8 1867560
9 9593844
10 48665904
11 244357740
12 1216672824
13 6015296484
14 29561944128
15 144531868764
16 703461546312
17 3410368965588
18 16475694411600
19 79347347565132
20 381071870841432

List of values

[12, 48, 348, 2136, 12228, 67104, 357756, 1867560, 9593844, 48665904, 244357740, 1216672824, 6015296484, 29561944128, 144531868764, 703461546312, 3410368965588, 16475694411600, 79347347565132, 381071870841432]

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

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