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.

A241286 Number of 4Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4.

Table of values

n a(n)
1 24
2 36
3 236
4 773
5 1800
6 16843
7 54167
8 159403
9 1014287
10 3055986
11 10609732
12 60969600
13 191316011
14 725713555
15 3761999379
16 12377676801
17 48908645074
18 236055743934
19 808188094976
20 3233355467890
21 14810044876373
22 52228582550562

List of values

[24, 36, 236, 773, 1800, 16843, 54167, 159403, 1014287, 3055986, 10609732, 60969600, 191316011, 725713555, 3761999379, 12377676801, 48908645074, 236055743934, 808188094976, 3233355467890, 14810044876373, 52228582550562]

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

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