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.

A126232 Number of functions f:{1,2,...,n}->{1,2,...,n} such that Im(f) contains 5 fixed elements.

Table of values

n a(n)
5 120
6 2520
7 52080
8 1164240
9 28594440
10 771309000
11 22746757440
12 729419296320
13 25295774463960
14 943934414262840
15 37728367833920400
16 1608541146018621360
17 72881990543360522280
18 3497670707401587171240
19 177254235519701336515680

List of values

[120, 2520, 52080, 1164240, 28594440, 771309000, 22746757440, 729419296320, 25295774463960, 943934414262840, 37728367833920400, 1608541146018621360, 72881990543360522280, 3497670707401587171240, 177254235519701336515680]

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

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