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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.

A331335 L.g.f.: log(Sum_{k>=0} k! * x^k / Product_{j=1..k} (1 - j*x)).

Table of values

n a(n)
1 1
2 5
3 31
4 241
5 2231
6 23825
7 287687
8 3872961
9 57514423
10 934197425
11 16480953127
12 313919262625
13 6422468800151
14 140496324183185
15 3273117681693191
16 80916019512168321
17 2115854823935820151
18 58351931794643315825
19 1692782510862560536807
20 51533053881743794186081

List of values

[1, 5, 31, 241, 2231, 23825, 287687, 3872961, 57514423, 934197425, 16480953127, 313919262625, 6422468800151, 140496324183185, 3273117681693191, 80916019512168321, 2115854823935820151, 58351931794643315825, 1692782510862560536807, 51533053881743794186081]

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

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