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.

A212315 Numbers m such that B(m) = B(triangular(m)), where B(m) is the binary weight of m (A000120).

Table of values

n a(n)
1 0
2 1
3 3
4 7
5 15
6 31
7 39
8 45
9 63
10 78
11 79
12 91
13 93
14 127
15 139
16 143
17 158
18 159
19 175
20 182
21 187
22 189
23 222
24 255
25 286
26 287
27 318
28 319
29 351
30 367
31 375
32 379
33 381
34 407
35 446
36 487
37 511
38 535
39 543
40 572
41 574
42 575
43 607
44 627
45 638
46 639
47 703
48 724
49 727
50 731
51 747
52 750
53 759
54 763
55 765
56 799
57 823
58 830

List of values

[0, 1, 3, 7, 15, 31, 39, 45, 63, 78, 79, 91, 93, 127, 139, 143, 158, 159, 175, 182, 187, 189, 222, 255, 286, 287, 318, 319, 351, 367, 375, 379, 381, 407, 446, 487, 511, 535, 543, 572, 574, 575, 607, 627, 638, 639, 703, 724, 727, 731, 747, 750, 759, 763, 765, 799, 823, 830]

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

Content is available under The OEIS End-User License Agreement.