A330446 - cp's OEIS frontend

A330446 Composite numbers k such that 2^(k-1) == - lambda(k) (mod k), where lambda is the Carmichael lambda function (A002322).

n	a(n)
1	140
2	1054
3	1068
4	4844
5	11209
6	19856
7	24949
8	28390
9	78184
10	423796
11	769516
12	4283544
13	5935168
14	13116053
15	122189752
16	441252296
17	528500308
18	636697392
19	669629030
20	669778082
21	1228748591

[140, 1054, 1068, 4844, 11209, 19856, 24949, 28390, 78184, 423796, 769516, 4283544, 5935168, 13116053, 122189752, 441252296, 528500308, 636697392, 669629030, 669778082, 1228748591]

cp's OEIS Frontend

A330446 Composite numbers k such that 2^(k-1) == - lambda(k) (mod k), where lambda is the Carmichael lambda function (A002322).

Table of values

List of values