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.

A275223 Number of nX3 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,1) or (-1,0) and new values introduced in order 0..2.

Table of values

n a(n)
1 5
2 36
3 61
4 187
5 648
6 2282
7 8134
8 29027
9 103456
10 368889
11 1315431
12 4690476
13 16725240
14 59638892
15 212660009
16 758302172
17 2703951339
18 9641739667
19 34380480348
20 122593793026
21 437144505226
22 1558768299519
23 5558250385696
24 19819589184889

List of values

[5, 36, 61, 187, 648, 2282, 8134, 29027, 103456, 368889, 1315431, 4690476, 16725240, 59638892, 212660009, 758302172, 2703951339, 9641739667, 34380480348, 122593793026, 437144505226, 1558768299519, 5558250385696, 19819589184889]

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

Content is available under The OEIS End-User License Agreement.