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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.

A261441 Number of binary strings of length n+3 such that the smallest number whose binary representation is not visible in the string is 5.

Table of values

n a(n)
0 0
1 1
2 5
3 15
4 35
5 73
6 144
7 274
8 509
9 931
10 1685
11 3027
12 5409
13 9628
14 17088
15 30261
16 53497
17 94447
18 166563
19 293489
20 516772
21 909402
22 1599585
23 2812479
24 4943461
25 8686739
26 15261105
27 26806184
28 47077920
29 82669241
30 145152429
31 254839087
32 447378963
33 785340873
34 1378536968

List of values

[0, 1, 5, 15, 35, 73, 144, 274, 509, 931, 1685, 3027, 5409, 9628, 17088, 30261, 53497, 94447, 166563, 293489, 516772, 909402, 1599585, 2812479, 4943461, 8686739, 15261105, 26806184, 47077920, 82669241, 145152429, 254839087, 447378963, 785340873, 1378536968]

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

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