cp's OEIS Frontend

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.

A000620 Number of monosubstituted alkanes C(n-1)H(2n-1)-X with n-1 carbon atoms that are stereoisomers.

Table of values

n a(n)
1 0
2 0
3 0
4 0
5 2
6 6
7 20
8 60
9 176
10 512
11 1488
12 4326
13 12648
14 37186
15 109980
16 327216
17 979020
18 2944414
19 8897732
20 27005290
21 82288516
22 251650788
23 772127678
24 2376238138
25 7333188770
26 22688297950
27 70360977228
28 218678818026
29 681017928476
30 2124840874610
31 6641336507270
32 20791999731518

List of values

[0, 0, 0, 0, 2, 6, 20, 60, 176, 512, 1488, 4326, 12648, 37186, 109980, 327216, 979020, 2944414, 8897732, 27005290, 82288516, 251650788, 772127678, 2376238138, 7333188770, 22688297950, 70360977228, 218678818026, 681017928476, 2124840874610, 6641336507270, 20791999731518]

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

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