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.

A268805 Number of nX4 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once.

Table of values

n a(n)
1 60
2 290
3 1202
4 5848
5 28452
6 135912
7 640926
8 2990786
9 13835892
10 63544542
11 290056316
12 1317009868
13 5952527788
14 26795651036
15 120193389832
16 537427198324
17 2396207992178
18 10656560102448
19 47282655935580
20 209348341875062

List of values

[60, 290, 1202, 5848, 28452, 135912, 640926, 2990786, 13835892, 63544542, 290056316, 1317009868, 5952527788, 26795651036, 120193389832, 537427198324, 2396207992178, 10656560102448, 47282655935580, 209348341875062]

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

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