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.

A183822 1/256 the number of (n+1)X4 0..3 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.

Table of values

n a(n)
1 225
2 43947
3 8538066
4 1661285961
5 323115202755
6 62851591581012
7 12225396762980829
8 2378005715920214025
9 462553489019014423650
10 89972804578123532061801
11 17500904466916598194011543

List of values

[225, 43947, 8538066, 1661285961, 323115202755, 62851591581012, 12225396762980829, 2378005715920214025, 462553489019014423650, 89972804578123532061801, 17500904466916598194011543]

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

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