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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.

A308700 a(n) = n * 2^(n - 2) * (2^(n - 1) - 1).

Table of values

n a(n)
0 0
1 0
2 2
3 18
4 112
5 600
6 2976
7 14112
8 65024
9 293760
10 1308160
11 5761536
12 25153536
13 109025280
14 469704704
15 2013143040
16 8589672448
17 36506664960
18 154617643008
19 652832538624
20 2748773826560
21 11544861081600
22 48378488553472
23 202310091276288
24 844424829468672
25 3518436999168000

List of values

[0, 0, 2, 18, 112, 600, 2976, 14112, 65024, 293760, 1308160, 5761536, 25153536, 109025280, 469704704, 2013143040, 8589672448, 36506664960, 154617643008, 652832538624, 2748773826560, 11544861081600, 48378488553472, 202310091276288, 844424829468672, 3518436999168000]

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

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