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.

A000621 Number of monosubstituted alkanes C(n-1)H(2n-1)-X with n-1 carbon atoms that are not stereoisomers.

Table of values

n a(n)
1 1
2 1
3 1
4 2
5 3
6 5
7 8
8 14
9 23
10 39
11 65
12 110
13 184
14 310
15 520
16 876
17 1471
18 2475
19 4159
20 6996
21 11759
22 19775
23 33244
24 55902
25 93984
26 158030
27 265696
28 446746
29 751128
30 1262940
31 2123444
32 3570318
33 6002983
34 10093259
35 16970431
36 28533590
37 47975381
38 80664329
39 135626284
40 228037752

List of values

[1, 1, 1, 2, 3, 5, 8, 14, 23, 39, 65, 110, 184, 310, 520, 876, 1471, 2475, 4159, 6996, 11759, 19775, 33244, 55902, 93984, 158030, 265696, 446746, 751128, 1262940, 2123444, 3570318, 6002983, 10093259, 16970431, 28533590, 47975381, 80664329, 135626284, 228037752]

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

Content is available under The OEIS End-User License Agreement.