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.

A357781 Semiprimes k such that k is congruent to 1 modulo k's index in the sequence of semiprimes.

Table of values

n a(n)
1 4
2 82
3 85
4 106
5 121
6 133
7 142
8 166
9 169
10 217
11 3067001
12 3067006
13 3067286
14 3067411
15 3067651
16 3067691
17 3067721
18 3067751
19 3067771
20 3067781
21 3067801
22 3068071
23 348933121
24 348933127
25 348933199
26 348933223
27 348933241
28 348933259
29 348933271
30 348933427
31 44690978221
32 44690978543
33 44690978669

List of values

[4, 82, 85, 106, 121, 133, 142, 166, 169, 217, 3067001, 3067006, 3067286, 3067411, 3067651, 3067691, 3067721, 3067751, 3067771, 3067781, 3067801, 3068071, 348933121, 348933127, 348933199, 348933223, 348933241, 348933259, 348933271, 348933427, 44690978221, 44690978543, 44690978669]

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

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