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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.

A379613 a(n) = n^(n - 1) - 2*(n + 1)^(n - 2), by convention a(0) = 0.

Table of values

n a(n)
0 0
1 0
2 0
3 1
4 14
5 193
6 2974
7 52113
8 1034270
9 23046721
10 571282238
11 15617863897
12 467291386990
13 15198954783153
14 534222097472894
15 20185726770649633
16 816165851488045118
17 35167910642711951617
18 1609028732603454196606
19 77912950297911241532841
20 3981118415206568940420878

List of values

[0, 0, 0, 1, 14, 193, 2974, 52113, 1034270, 23046721, 571282238, 15617863897, 467291386990, 15198954783153, 534222097472894, 20185726770649633, 816165851488045118, 35167910642711951617, 1609028732603454196606, 77912950297911241532841, 3981118415206568940420878]

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

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