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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.

A054422 Number of unlabeled asymmetric ternary cacti having n triangles.

Table of values

n a(n)
0 1
1 1
2 0
3 3
4 10
5 54
6 222
7 1107
8 5346
9 27399
10 142770
11 764967
12 4170672
13 23140813
14 130189302
15 741650172
16 4270501218
17 24825326196
18 145534796520
19 859627488963
20 5112003992610
21 30586307195304
22 184023393204654
23 1112800162657899

List of values

[1, 1, 0, 3, 10, 54, 222, 1107, 5346, 27399, 142770, 764967, 4170672, 23140813, 130189302, 741650172, 4270501218, 24825326196, 145534796520, 859627488963, 5112003992610, 30586307195304, 184023393204654, 1112800162657899]

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

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