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.

A240417 Number of 6Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4.

Table of values

n a(n)
1 129
2 2105
3 79090
4 2051450
5 45245148
6 1615637679
7 38249442962
8 955439201951
9 28422088797325
10 653249891295733
11 18365583086851745
12 495763997190145130
13 12117652634246661607
14 341107664098435880768
15 8779799870508201530267

List of values

[129, 2105, 79090, 2051450, 45245148, 1615637679, 38249442962, 955439201951, 28422088797325, 653249891295733, 18365583086851745, 495763997190145130, 12117652634246661607, 341107664098435880768, 8779799870508201530267]

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

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