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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.

A005172 Number of labeled rooted trees of subsets of an n-set.

Table of values

n a(n)
1 1
2 4
3 32
4 416
5 7552
6 176128
7 5018624
8 168968192
9 6563282944
10 288909131776
11 14212910809088
12 772776684683264
13 46017323176296448
14 2978458881388183552
15 208198894960190160896
16 15631251601179130462208
17 1254492810303112820555776
18 107174403941451434687463424
19 9711022458989438255300083712

List of values

[1, 4, 32, 416, 7552, 176128, 5018624, 168968192, 6563282944, 288909131776, 14212910809088, 772776684683264, 46017323176296448, 2978458881388183552, 208198894960190160896, 15631251601179130462208, 1254492810303112820555776, 107174403941451434687463424, 9711022458989438255300083712]

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

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