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.

A274729 Number of 4 X n 0..2 arrays with no element equal to any value at offset (-1,-2) (-2,-1) or (-1,0) and new values introduced in order 0..2.

Table of values

n a(n)
1 4
2 48
3 260
4 1632
5 10368
6 66132
7 421904
8 2691884
9 17175124
10 109583308
11 699179884
12 4461012792
13 28462825592
14 181602806300
15 1158689573772
16 7392845715224
17 47168947581908
18 300954422923484
19 1920194732348424
20 12251515609312728

List of values

[4, 48, 260, 1632, 10368, 66132, 421904, 2691884, 17175124, 109583308, 699179884, 4461012792, 28462825592, 181602806300, 1158689573772, 7392845715224, 47168947581908, 300954422923484, 1920194732348424, 12251515609312728]

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

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