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.

A115741 Semiprimes (A001358) whose digit reversal is a triangular number.

Table of values

n a(n)
1 6
2 10
3 51
4 55
5 82
6 87
7 309
8 501
9 649
10 694
11 1198
12 1207
13 1473
14 1765
15 1803
16 1837
17 1959
18 1981
19 3043
20 3057
21 3561
22 3574
23 5158
24 5221
25 5721
26 6139
27 6193
28 6267
29 6535
30 6711
31 6814
32 6843
33 10473
34 10497
35 11553
36 12477
37 12693
38 13123
39 13701
40 13951
41 14169

List of values

[6, 10, 51, 55, 82, 87, 309, 501, 649, 694, 1198, 1207, 1473, 1765, 1803, 1837, 1959, 1981, 3043, 3057, 3561, 3574, 5158, 5221, 5721, 6139, 6193, 6267, 6535, 6711, 6814, 6843, 10473, 10497, 11553, 12477, 12693, 13123, 13701, 13951, 14169]

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

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