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.

A367636 a(n) is the number of distinct combinations that can be created by painting the sections on a shape with n divisions that rotates around its center and consists of 4 identical arms at 90-degree intervals.

Table of values

n a(n)
1 2
2 12
3 140
4 2088
5 32912
6 524832
7 8390720
8 134226048
9 2147516672
10 34359869952
11 549756339200
12 8796095121408
13 140737496748032
14 2251799847247872
15 36028797153198080
16 576460752840327168
17 9223372039002324992
18 147573952598266478592
19 2361183241469182607360
20 37778931863094601187328

List of values

[2, 12, 140, 2088, 32912, 524832, 8390720, 134226048, 2147516672, 34359869952, 549756339200, 8796095121408, 140737496748032, 2251799847247872, 36028797153198080, 576460752840327168, 9223372039002324992, 147573952598266478592, 2361183241469182607360, 37778931863094601187328]

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

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