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.

A275184 Number of 4 X n 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,0) or (-1,1) and new values introduced in order 0..2.

Table of values

n a(n)
1 4
2 12
3 41
4 141
5 482
6 1651
7 5653
8 19356
9 66277
10 226937
11 777050
12 2660679
13 9110369
14 31194604
15 106812721
16 365734965
17 1252304626
18 4287987275
19 14682397949
20 50273658876
21 172140871373
22 589423572097
23 2018231606314
24 6910580115135

List of values

[4, 12, 41, 141, 482, 1651, 5653, 19356, 66277, 226937, 777050, 2660679, 9110369, 31194604, 106812721, 365734965, 1252304626, 4287987275, 14682397949, 50273658876, 172140871373, 589423572097, 2018231606314, 6910580115135]

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

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