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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.

A124009 Number of permutations of n distinct letters (ABCD...) each of which appears thrice with one fixed point.

Table of values

n a(n)
0 0
1 0
2 216
3 49464
4 23123880
5 19180338840
6 25791442770240
7 52614269909090064
8 154809621283047068016
9 631429039396055199165840
10 3457808596178310768284115720
11 24763433580060911383347280813320

List of values

[0, 0, 216, 49464, 23123880, 19180338840, 25791442770240, 52614269909090064, 154809621283047068016, 631429039396055199165840, 3457808596178310768284115720, 24763433580060911383347280813320]

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

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