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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.

A099710 Consider the family of directed multigraphs enriched by the species of endofunctions. Sequence gives number of those multigraphs with n labeled loops and arcs.

Table of values

n a(n)
0 1
1 2
2 21
3 372
4 9503
5 323528
6 13976119
7 740471952
8 46918236113
9 3486842393336
10 299252510858253
11 29285226572514608
12 3233515108614711055
13 399237909648934968160
14 54699907257463871118015
15 8261287679602024304387776
16 1367355850924129919137226337
17 246745297507913180076213875232

List of values

[1, 2, 21, 372, 9503, 323528, 13976119, 740471952, 46918236113, 3486842393336, 299252510858253, 29285226572514608, 3233515108614711055, 399237909648934968160, 54699907257463871118015, 8261287679602024304387776, 1367355850924129919137226337, 246745297507913180076213875232]

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

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