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.

A364328 Number of endofunctions on [n] such that the number of elements that are mapped to i is either 0 or a prime divisor of i.

Table of values

n a(n)
0 1
1 0
2 1
3 1
4 6
5 21
6 110
7 904
8 4312
9 74400
10 731412
11 5600761
12 128196024
13 792051157
14 18696610816
15 264267572121
16 7136433698464
17 57948743342529
18 2228312959187256
19 22463157401776612
20 681974906329502904
21 15395459281239915282
22 463374873030990445252
23 6091833036158810701465

List of values

[1, 0, 1, 1, 6, 21, 110, 904, 4312, 74400, 731412, 5600761, 128196024, 792051157, 18696610816, 264267572121, 7136433698464, 57948743342529, 2228312959187256, 22463157401776612, 681974906329502904, 15395459281239915282, 463374873030990445252, 6091833036158810701465]

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

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