A309738 - cp's OEIS frontend

A309738 Primes of the form b^210^(2k) + b*10^k + 1 for 1 <= b <= 9, k >= 0.

n	a(n)
1	3
2	7
3	13
4	31
5	43
6	73
7	421
8	2551
9	6481
10	8191
11	250501
12	4002001
13	64008001
14	81009001
15	40000200001
16	90000300001
17	64000008000001
18	400000000020000000001
19	3600000000060000000001
20	64000000000008000000000001
21	90000000000000300000000000001
22	250000000000000500000000000001

[3, 7, 13, 31, 43, 73, 421, 2551, 6481, 8191, 250501, 4002001, 64008001, 81009001, 40000200001, 90000300001, 64000008000001, 400000000020000000001, 3600000000060000000001, 64000000000008000000000001, 90000000000000300000000000001, 250000000000000500000000000001]

cp's OEIS Frontend

A309738 Primes of the form b^210^(2k) + b*10^k + 1 for 1 <= b <= 9, k >= 0.

Table of values

List of values

cp's OEIS Frontend

A309738 Primes of the form b^2*10^(2*k) + b*10^k + 1 for 1 <= b <= 9, k >= 0.

Table of values

List of values

A309738 Primes of the form b^210^(2k) + b*10^k + 1 for 1 <= b <= 9, k >= 0.