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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.

A247457 Numbers k such that d(r,k) = 1 and d(s,k) = 0, where d(x,k) = k-th binary digit of x, r = {sqrt(2)}, s = {3*sqrt(2)}, and { } = fractional part.

Table of values

n a(n)
1 2
2 18
3 22
4 26
5 35
6 41
7 45
8 49
9 65
10 67
11 71
12 77
13 79
14 88
15 90
16 95
17 98
18 108
19 110
20 112
21 117
22 126
23 133
24 135
25 138
26 143
27 145
28 152
29 155
30 172
31 175
32 188
33 194
34 196
35 203
36 208
37 210
38 212
39 221
40 223
41 230
42 234
43 239
44 243
45 260
46 262
47 268
48 278
49 292
50 294
51 296
52 299
53 310
54 312
55 319

List of values

[2, 18, 22, 26, 35, 41, 45, 49, 65, 67, 71, 77, 79, 88, 90, 95, 98, 108, 110, 112, 117, 126, 133, 135, 138, 143, 145, 152, 155, 172, 175, 188, 194, 196, 203, 208, 210, 212, 221, 223, 230, 234, 239, 243, 260, 262, 268, 278, 292, 294, 296, 299, 310, 312, 319]

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

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