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.

A194420 Numbers m such that Sum_{k=1..m} (<1/3 + k*r> - ) = 0, where r=sqrt(5) and < > denotes fractional part.

Table of values

n a(n)
1 3
2 6
3 9
4 12
5 21
6 42
7 60
8 63
9 72
10 75
11 78
12 81
13 84
14 93
15 114
16 132
17 135
18 144
19 147
20 150
21 153
22 156
23 165
24 186
25 204
26 207
27 216
28 219
29 222
30 225
31 228
32 237
33 258
34 276
35 279
36 288
37 291
38 294
39 297
40 300
41 309
42 381
43 453
44 525
45 597
46 669
47 687
48 690

List of values

[3, 6, 9, 12, 21, 42, 60, 63, 72, 75, 78, 81, 84, 93, 114, 132, 135, 144, 147, 150, 153, 156, 165, 186, 204, 207, 216, 219, 222, 225, 228, 237, 258, 276, 279, 288, 291, 294, 297, 300, 309, 381, 453, 525, 597, 669, 687, 690]