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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.

A291842 a(n) is the number of labeled connected planar graphs with n edges.

Table of values

n a(n)
1 1
2 3
3 17
4 140
5 1524
6 20673
7 336259
8 6382302
9 138525770
10 3384987698
11 91976075664
12 2751117418712
13 89832957177685
14 3179833729806525
15 121286809954760876
16 4959277317653328656
17 216402696660205555698
18 10037527922988058277877
19 493159461152794975438450
20 25585023231409205439510792

List of values

[1, 3, 17, 140, 1524, 20673, 336259, 6382302, 138525770, 3384987698, 91976075664, 2751117418712, 89832957177685, 3179833729806525, 121286809954760876, 4959277317653328656, 216402696660205555698, 10037527922988058277877, 493159461152794975438450, 25585023231409205439510792]

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

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