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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.

A374737 Number of subsets of {1,2,...,n} such that no two elements differ by 1 or 5.

Table of values

n a(n)
0 1
1 2
2 3
3 5
4 8
5 13
6 18
7 28
8 41
9 62
10 91
11 141
12 208
13 317
14 473
15 719
16 1069
17 1623
18 2425
19 3666
20 5487
21 8295
22 12424
23 18751
24 28130
25 42416
26 63657
27 95944
28 144083
29 217023
30 326060
31 490985
32 737849
33 1110753
34 1669685
35 2512993
36 3778125
37 5685594
38 8549027
39 12863637
40 19344100
41 29104549

List of values

[1, 2, 3, 5, 8, 13, 18, 28, 41, 62, 91, 141, 208, 317, 473, 719, 1069, 1623, 2425, 3666, 5487, 8295, 12424, 18751, 28130, 42416, 63657, 95944, 144083, 217023, 326060, 490985, 737849, 1110753, 1669685, 2512993, 3778125, 5685594, 8549027, 12863637, 19344100, 29104549]

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

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