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.

A179970 Numbers such that in base-4 representation all sums of two adjacent digits are odd.

Table of values

n a(n)
1 0
2 1
3 2
4 3
5 4
6 6
7 9
8 11
9 12
10 14
11 17
12 19
13 25
14 27
15 36
16 38
17 44
18 46
19 49
20 51
21 57
22 59
23 68
24 70
25 76
26 78
27 100
28 102
29 108
30 110
31 145
32 147
33 153
34 155
35 177
36 179
37 185
38 187
39 196
40 198
41 204
42 206
43 228
44 230
45 236
46 238
47 273
48 275
49 281
50 283
51 305
52 307
53 313
54 315
55 401
56 403
57 409
58 411
59 433
60 435

List of values

[0, 1, 2, 3, 4, 6, 9, 11, 12, 14, 17, 19, 25, 27, 36, 38, 44, 46, 49, 51, 57, 59, 68, 70, 76, 78, 100, 102, 108, 110, 145, 147, 153, 155, 177, 179, 185, 187, 196, 198, 204, 206, 228, 230, 236, 238, 273, 275, 281, 283, 305, 307, 313, 315, 401, 403, 409, 411, 433, 435]

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

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