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.

A032071 Number of reversible strings with n labeled beads of 4 colors, no palindromes of more than 1 bead.

Table of values

n a(n)
1 4
2 12
3 144
4 2880
5 57600
6 1451520
7 40642560
8 1316044800
9 47377612800
10 1900678348800
11 83629847347200
12 4017175658496000
13 208893134241792000
14 11700158011224883200
15 702009480673492992000

List of values

[4, 12, 144, 2880, 57600, 1451520, 40642560, 1316044800, 47377612800, 1900678348800, 83629847347200, 4017175658496000, 208893134241792000, 11700158011224883200, 702009480673492992000]

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

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