cp's OEIS Frontend

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.

A099695 Consider the family of directed multigraphs enriched by the species of directed sets. Sequence gives number of those multigraphs with n labeled arcs.

Table of values

n a(n)
0 1
1 1
2 8
3 106
4 2144
5 59844
6 2173450
7 98648246
8 5433864078
9 355229741266
10 27080154837658
11 2373310690810690
12 236327564463489838
13 26475199136060717618
14 3308794737926514931894
15 457980967372496137472590
16 69761664006643652403884218
17 11629282648335699139979015070

List of values

[1, 1, 8, 106, 2144, 59844, 2173450, 98648246, 5433864078, 355229741266, 27080154837658, 2373310690810690, 236327564463489838, 26475199136060717618, 3308794737926514931894, 457980967372496137472590, 69761664006643652403884218, 11629282648335699139979015070]

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

Content is available under The OEIS End-User License Agreement.