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.

A276295 Number of nX4 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,1) or (0,-1) and new values introduced in order 0..2.

Table of values

n a(n)
1 4
2 36
3 173
4 1017
5 5965
6 34865
7 203933
8 1192701
9 6974781
10 40786925
11 238509373
12 1394719389
13 8155807421
14 47692103389
15 278885349565
16 1630815353885
17 9536385985277
18 55765143107101
19 326093248975229
20 1906868691945053

List of values

[4, 36, 173, 1017, 5965, 34865, 203933, 1192701, 6974781, 40786925, 238509373, 1394719389, 8155807421, 47692103389, 278885349565, 1630815353885, 9536385985277, 55765143107101, 326093248975229, 1906868691945053]

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

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