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.

A107894 Sum over the products of factorials of parts in all partitions of n where the sum runs over the number of different parts only.

Table of values

n a(n)
0 1
1 1
2 3
3 9
4 35
5 167
6 943
7 6379
8 48945
9 429651
10 4189865
11 45307601
12 535518109
13 6883110373
14 95435065935
15 1420468921893
16 22577620176887
17 381695573051099
18 6837601709298811
19 129375694813679215
20 2578070946813526485
21 53964818587883937807
22 1183805926540690127573

List of values

[1, 1, 3, 9, 35, 167, 943, 6379, 48945, 429651, 4189865, 45307601, 535518109, 6883110373, 95435065935, 1420468921893, 22577620176887, 381695573051099, 6837601709298811, 129375694813679215, 2578070946813526485, 53964818587883937807, 1183805926540690127573]

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

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