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.

A239409 Number of 5Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of the elements above it, modulo 4.

Table of values

n a(n)
1 66
2 3805
3 205969
4 11334364
5 614216271
6 33522573911
7 1820591502437
8 99155297311831
9 5390539057008613
10 293381673332485198
11 15956203146991156417
12 868193383242995642964
13 47226335011968154541246
14 2569370658950018916786902

List of values

[66, 3805, 205969, 11334364, 614216271, 33522573911, 1820591502437, 99155297311831, 5390539057008613, 293381673332485198, 15956203146991156417, 868193383242995642964, 47226335011968154541246, 2569370658950018916786902]

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

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