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.

A274897 Number of 5 X n 0..2 arrays with no element equal to any value at offset (0,-1) (-1,-1) or (-2,0) and new values introduced in order 0..2.

Table of values

n a(n)
1 12
2 26
3 84
4 275
5 913
6 3064
7 10337
8 34921
9 117975
10 398560
11 1346637
12 4550382
13 15376372
14 51958316
15 175571071
16 593268299
17 2004704682
18 6774075554
19 22890197334
20 77347965186
21 261365481435
22 883176688023
23 2984330940525
24 10084314105326

List of values

[12, 26, 84, 275, 913, 3064, 10337, 34921, 117975, 398560, 1346637, 4550382, 15376372, 51958316, 175571071, 593268299, 2004704682, 6774075554, 22890197334, 77347965186, 261365481435, 883176688023, 2984330940525, 10084314105326]

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

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