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.

A207651 G.f.: Sum_{n>=0} Product_{k=1..n} (1 - (1-x)^k)/(1 - x^k).

Table of values

n a(n)
0 1
1 1
2 3
3 8
4 25
5 83
6 323
7 1410
8 7062
9 39660
10 248287
11 1709505
12 12843315
13 104446836
14 913968191
15 8560027375
16 85427505885
17 904899664970
18 10139054456975
19 119802780498730
20 1488769376468607
21 19409525611304801
22 264890181139521141
23 3776619220990535910

List of values

[1, 1, 3, 8, 25, 83, 323, 1410, 7062, 39660, 248287, 1709505, 12843315, 104446836, 913968191, 8560027375, 85427505885, 904899664970, 10139054456975, 119802780498730, 1488769376468607, 19409525611304801, 264890181139521141, 3776619220990535910]