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.

A209523 Number of nX4 0..7 arrays with every 2X2 subblock containing exactly one value repeat, and new values 0..7 introduced in row major order.

Table of values

n a(n)
1 15
2 700
3 107693
4 27323948
5 9700576474
6 4194606038254
7 2002617518101082
8 999998646599976052
9 509185650061380676984
10 261448697342101358568952
11 134726519599100535344614118
12 69532388907494477391456512054

List of values

[15, 700, 107693, 27323948, 9700576474, 4194606038254, 2002617518101082, 999998646599976052, 509185650061380676984, 261448697342101358568952, 134726519599100535344614118, 69532388907494477391456512054]

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

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