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.

A183478 Number of nX4 0..2 arrays with every element equal to either the sum mod 3 of its vertical neighbors or the sum mod 3 of its horizontal neighbors.

Table of values

n a(n)
1 7
2 135
3 587
4 4015
5 40073
6 270549
7 1942323
8 15984991
9 119888365
10 894632985
11 6977123487
12 53362780811
13 405255680609
14 3117495042837
15 23903072796727
16 182681815961381
17 1400954811635395
18 10740879929227211
19 82253911392409687

List of values

[7, 135, 587, 4015, 40073, 270549, 1942323, 15984991, 119888365, 894632985, 6977123487, 53362780811, 405255680609, 3117495042837, 23903072796727, 182681815961381, 1400954811635395, 10740879929227211, 82253911392409687]

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

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