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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.

A098627 Consider the family of directed multigraphs enriched by the species of derangements. Sequence gives number of those multigraphs with n labeled arcs.

Table of values

n a(n)
0 1
1 0
2 1
3 2
4 27
5 164
6 2335
7 25458
8 437241
9 6965112
10 145640817
11 3057675290
12 76814951587
13 2003471245164
14 59438049704943
15 1855131250113498
16 63937099992148785
17 2327591284996635888
18 91854272591000172321
19 3828194864278619367474
20 170846746588575658999147

List of values

[1, 0, 1, 2, 27, 164, 2335, 25458, 437241, 6965112, 145640817, 3057675290, 76814951587, 2003471245164, 59438049704943, 1855131250113498, 63937099992148785, 2327591284996635888, 91854272591000172321, 3828194864278619367474, 170846746588575658999147]

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

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