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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.

A303829 Birooted graphs: number of unlabeled graphs with n nodes rooted at 2 indistinguishable roots.

Table of values

n a(n)
1 0
2 2
3 6
4 28
5 148
6 1144
7 13128
8 250240
9 8295664
10 494367376
11 53628829952
12 10655018252544
13 3893626388008448
14 2627758027841688960
15 3289042848785452985600
16 7666804477507744021487616
17 33416397343695235205887366144
18 273365202164844511328577434284160

List of values

[0, 2, 6, 28, 148, 1144, 13128, 250240, 8295664, 494367376, 53628829952, 10655018252544, 3893626388008448, 2627758027841688960, 3289042848785452985600, 7666804477507744021487616, 33416397343695235205887366144, 273365202164844511328577434284160]

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

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