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.

A329496 Denominator of second moment of the n-th term of Ulam's "history-dependent random sequence".

Table of values

n a(n)
1 1
2 1
3 2
4 3
5 8
6 60
7 240
8 2520
9 40320
10 181440
11 725760
12 266112
13 95800320
14 17791488
15 1585059840
16 130767436800
17 1394852659200
18 35568742809600
19 20324995891200
20 12164510040883200
21 69511485947904000
22 5109094217170944000
23 32114306507931648000

List of values

[1, 1, 2, 3, 8, 60, 240, 2520, 40320, 181440, 725760, 266112, 95800320, 17791488, 1585059840, 130767436800, 1394852659200, 35568742809600, 20324995891200, 12164510040883200, 69511485947904000, 5109094217170944000, 32114306507931648000]

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

Content is available under The OEIS End-User License Agreement.