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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.

A385870 Number of subsets of {1,2,...,n} such that no two elements differ by 1 or 6.

Table of values

n a(n)
0 1
1 2
2 3
3 5
4 8
5 13
6 21
7 29
8 45
9 66
10 99
11 148
12 218
13 337
14 497
15 755
16 1131
17 1699
18 2571
19 3824
20 5794
21 8661
22 13041
23 19601
24 29376
25 44311
26 66349
27 99936
28 150000
29 225387
30 339000
31 508631
32 765392
33 1148865
34 1727249
35 2595270
36 3898324
37 5861084
38 8801690
39 13231745
40 19877092
41 29869125

List of values

[1, 2, 3, 5, 8, 13, 21, 29, 45, 66, 99, 148, 218, 337, 497, 755, 1131, 1699, 2571, 3824, 5794, 8661, 13041, 19601, 29376, 44311, 66349, 99936, 150000, 225387, 339000, 508631, 765392, 1148865, 1727249, 2595270, 3898324, 5861084, 8801690, 13231745, 19877092, 29869125]

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

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