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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.

A261077 Semiprimes whose prime factors differ from each other in one bit position only.

Table of values

n a(n)
1 6
2 21
3 33
4 35
5 57
6 65
7 161
8 185
9 201
10 323
11 377
12 393
13 437
14 473
15 497
16 713
17 899
18 1529
19 1577
20 1763
21 1769
22 1841
23 1961
24 2021
25 2537
26 3233
27 3473
28 3497
29 3737
30 4553
31 4601
32 4757
33 5561
34 5609
35 5753
36 6497
37 7217
38 7313
39 9593
40 9797
41 10265
42 10403
43 10841
44 10961
45 11009
46 12297
47 14129
48 15689
49 17513
50 18209
51 19043
52 19337
53 21353
54 22499
55 23129
56 23393
57 26969
58 27221
59 27233
60 29177

List of values

[6, 21, 33, 35, 57, 65, 161, 185, 201, 323, 377, 393, 437, 473, 497, 713, 899, 1529, 1577, 1763, 1769, 1841, 1961, 2021, 2537, 3233, 3473, 3497, 3737, 4553, 4601, 4757, 5561, 5609, 5753, 6497, 7217, 7313, 9593, 9797, 10265, 10403, 10841, 10961, 11009, 12297, 14129, 15689, 17513, 18209, 19043, 19337, 21353, 22499, 23129, 23393, 26969, 27221, 27233, 29177]

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

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