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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.

A291961 Numbers n > 1 such that 2^lambda(n) == 1 (mod n^2), where lambda(n) is the Carmichael lambda function (A002322).

Table of values

n a(n)
1 1093
2 3279
3 3511
4 7651
5 10533
6 14209
7 17555
8 22953
9 31599
10 42627
11 45643
12 52665
13 99463
14 136929
15 157995
16 228215
17 298389
18 410787
19 684645
20 2053935
21 3837523
22 11512569
23 19187615
24 26862661
25 34537707
26 49887799
27 57562845
28 80587983
29 134313305
30 149663397
31 172688535
32 241763949
33 249438995
34 349214593
35 402939915
36 448990191
37 748316985
38 1047643779
39 1208819745
40 1746072965
41 2244950955
42 3142931337
43 5238218895

List of values

[1093, 3279, 3511, 7651, 10533, 14209, 17555, 22953, 31599, 42627, 45643, 52665, 99463, 136929, 157995, 228215, 298389, 410787, 684645, 2053935, 3837523, 11512569, 19187615, 26862661, 34537707, 49887799, 57562845, 80587983, 134313305, 149663397, 172688535, 241763949, 249438995, 349214593, 402939915, 448990191, 748316985, 1047643779, 1208819745, 1746072965, 2244950955, 3142931337, 5238218895]

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

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