A215343 - cp's OEIS frontend

A215343 Fermat pseudoprimes to base 2 that can be written as 2*p^2 - p, where p is also a Fermat pseudoprime to base 2.

n	a(n)
1	831405
2	5977153
3	15913261
4	21474181
5	38171953
6	126619741
7	210565981
8	224073865
9	327718401
10	377616421
11	390922741
12	558097345
13	699735345
14	700932961
15	1327232481
16	1999743661
17	4996150741
18	8523152641
19	11358485281
20	13999580785
21	15613830541
22	17657245081
23	20442723301

[831405, 5977153, 15913261, 21474181, 38171953, 126619741, 210565981, 224073865, 327718401, 377616421, 390922741, 558097345, 699735345, 700932961, 1327232481, 1999743661, 4996150741, 8523152641, 11358485281, 13999580785, 15613830541, 17657245081, 20442723301]

cp's OEIS Frontend

A215343 Fermat pseudoprimes to base 2 that can be written as 2*p^2 - p, where p is also a Fermat pseudoprime to base 2.

Table of values

List of values