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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.

A347601 a(n) is the number of positive Euler permutations of order n.

Table of values

n a(n)
0 1
1 0
2 0
3 2
4 7
5 16
6 102
7 1042
8 8109
9 63280
10 642220
11 7500626
12 89458803
13 1135216800
14 15935870034
15 241410428162
16 3858227881945
17 65327424977824
18 1176448390679256
19 22388999178300514
20 447692501190569823
21 9395318712874789744
22 206713705368363820990
23 4755693997171333347506

List of values

[1, 0, 0, 2, 7, 16, 102, 1042, 8109, 63280, 642220, 7500626, 89458803, 1135216800, 15935870034, 241410428162, 3858227881945, 65327424977824, 1176448390679256, 22388999178300514, 447692501190569823, 9395318712874789744, 206713705368363820990, 4755693997171333347506]

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

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