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.

A221135 Number of nX4 arrays of occupancy after each element moves to some horizontal or vertical neighbor, with no occupancy greater than 2.

Table of values

n a(n)
1 4
2 289
3 12544
4 643204
5 31203396
6 1539699121
7 75512292025
8 3709710975721
9 182118668668225
10 8941989810789025
11 439009303948483984
12 21553427021714858449
13 1058163003670012270144
14 51950295646215686851681

List of values

[4, 289, 12544, 643204, 31203396, 1539699121, 75512292025, 3709710975721, 182118668668225, 8941989810789025, 439009303948483984, 21553427021714858449, 1058163003670012270144, 51950295646215686851681]

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

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