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.

A291110 Number of endofunctions on [n] such that the LCM of their cycle lengths equals four.

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 6
5 150
6 3240
7 71610
8 1692180
9 43296120
10 1202014800
11 36144686160
12 1173334341960
13 40964232699390
14 1532291272031520
15 61185138170697450
16 2599160146594218480
17 117091760635760465520
18 5577733223175044859840
19 280195572152151651031200

List of values

[0, 0, 0, 0, 6, 150, 3240, 71610, 1692180, 43296120, 1202014800, 36144686160, 1173334341960, 40964232699390, 1532291272031520, 61185138170697450, 2599160146594218480, 117091760635760465520, 5577733223175044859840, 280195572152151651031200]

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

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