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.

A275229 Number of 3 X n 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 2
2 11
3 61
4 339
5 1885
6 10483
7 58301
8 324243
9 1803293
10 10029107
11 55777405
12 310208979
13 1725243613
14 9595033459
15 53363285309
16 296782729491
17 1650572823965
18 9179747931827
19 51053652931069
20 283937587062867
21 1579133885991517

List of values

[2, 11, 61, 339, 1885, 10483, 58301, 324243, 1803293, 10029107, 55777405, 310208979, 1725243613, 9595033459, 53363285309, 296782729491, 1650572823965, 9179747931827, 51053652931069, 283937587062867, 1579133885991517]

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

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