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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.

A323941 Total number of isomers (nonisomorphic systems) of unbranched tri-4-catafusenes as a function of the number of hexagons (see Cyvin et al. (1996) for precise definition).

Table of values

n a(n)
3 1
4 3
5 16
6 62
7 275
8 1121
9 4584
10 18012
11 69573
12 262495
13 974704
14 3562714
15 12859127
16 45881213
17 162093320
18 567579192
19 1971791241
20 6801382203
21 23309839120
22 79421200630
23 269160513115
24 907726206233
25 3047449980392
26 10188384020372
27 33930772031565
28 112595241877911
29 372383348102640
30 1227721195083922

List of values

[1, 3, 16, 62, 275, 1121, 4584, 18012, 69573, 262495, 974704, 3562714, 12859127, 45881213, 162093320, 567579192, 1971791241, 6801382203, 23309839120, 79421200630, 269160513115, 907726206233, 3047449980392, 10188384020372, 33930772031565, 112595241877911, 372383348102640, 1227721195083922]

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

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