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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.

A338487 a(n) is the number of non-isomorphic, serial/parallel indecomposable resistor networks with n edges, n >= 5, allowing dead ends.

Table of values

n a(n)
5 1
6 5
7 36
8 225
9 1453
10 9228
11 58701
12 372695
13 2370155
14 15117459
15 96868355
16 624326820
17 4051597971
18 26496771687
19 174749567296
20 1162909625384
21 7812487626519
22 53005074235282
23 363305517314289
24 2516343623698964
25 17615995074375601
26 124669825295709879
27 892060223018406365

List of values

[1, 5, 36, 225, 1453, 9228, 58701, 372695, 2370155, 15117459, 96868355, 624326820, 4051597971, 26496771687, 174749567296, 1162909625384, 7812487626519, 53005074235282, 363305517314289, 2516343623698964, 17615995074375601, 124669825295709879, 892060223018406365]

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

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