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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.

A371548 Expansion of e.g.f. Product_{k>=1} (1 + 2*x^k/k).

Table of values

n a(n)
0 1
1 2
2 2
3 16
4 44
5 248
6 2136
7 13536
8 116448
9 1075392
10 13066560
11 136385280
12 1811975040
13 23777683200
14 354509003520
15 5632664970240
16 93712140103680
17 1631567291719680
18 30968760551178240
19 605247894280028160
20 12515132360676556800
21 274444506310599475200

List of values

[1, 2, 2, 16, 44, 248, 2136, 13536, 116448, 1075392, 13066560, 136385280, 1811975040, 23777683200, 354509003520, 5632664970240, 93712140103680, 1631567291719680, 30968760551178240, 605247894280028160, 12515132360676556800, 274444506310599475200]

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

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