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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.

A123367 a(n) = (n! - 2^n)/8, n >= 4.

Table of values

n a(n)
4 1
5 11
6 82
7 614
8 5008
9 45296
10 453472
11 4989344
12 59874688
13 778376576
14 10897284352
15 163459291904
16 2615348727808
17 44460928495616
18 800296713183232
19 15205637551038464
20 304112751021948928
21 6386367771463417856
22 140500090972200435712
23 3231502092360621031424

List of values

[1, 11, 82, 614, 5008, 45296, 453472, 4989344, 59874688, 778376576, 10897284352, 163459291904, 2615348727808, 44460928495616, 800296713183232, 15205637551038464, 304112751021948928, 6386367771463417856, 140500090972200435712, 3231502092360621031424]

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

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