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.

A274750 Number of 3 X n 0..2 arrays with no element equal to any value at offset (-1,-2) (0,-1) or (-1,0) and new values introduced in order 0..2.

Table of values

n a(n)
1 2
2 9
3 34
4 133
5 518
6 2017
7 7858
8 30605
9 119214
10 464345
11 1808682
12 7044997
13 27441030
14 106885713
15 416331266
16 1621654589
17 6316517406
18 24603508041
19 95833284570
20 373280851061
21 1453968675382
22 5663362861249
23 22059401583154
24 85923718843693

List of values

[2, 9, 34, 133, 518, 2017, 7858, 30605, 119214, 464345, 1808682, 7044997, 27441030, 106885713, 416331266, 1621654589, 6316517406, 24603508041, 95833284570, 373280851061, 1453968675382, 5663362861249, 22059401583154, 85923718843693]

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

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