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.

A186556 Number of (n+1)X4 0..3 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors.

Table of values

n a(n)
1 60074
2 13360840
3 2976803436
4 663296784123
5 147795682647630
6 32931888185295104
7 7337893459883784628
8 1635031754050410331405
9 364318292831600934919531
10 81177517366244082982029095

List of values

[60074, 13360840, 2976803436, 663296784123, 147795682647630, 32931888185295104, 7337893459883784628, 1635031754050410331405, 364318292831600934919531, 81177517366244082982029095]

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

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