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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.

A273657 Number of forests of labeled rooted trees of height at most 1, with n labels, seven of which are used for root nodes and any root may contain >= 1 labels.

Table of values

n a(n)
7 877
8 26104
9 463212
10 6409320
11 76595310
12 832521096
13 8480449692
14 82506827832
15 776400941745
16 7128606776720
17 64261876786536
18 571350882111984
19 5026991629995036
20 43878686837771760
21 380672326962043560
22 3287071510635218064
23 28280022744131688519
24 242602886107926614952

List of values

[877, 26104, 463212, 6409320, 76595310, 832521096, 8480449692, 82506827832, 776400941745, 7128606776720, 64261876786536, 571350882111984, 5026991629995036, 43878686837771760, 380672326962043560, 3287071510635218064, 28280022744131688519, 242602886107926614952]

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

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