A359492 - cp's OEIS frontend

A359492 a(n) is the least number of the form p^2 + q^2 - 2 for primes p and q that is an odd prime times 2^n, or -1 if there is no such number.

n	a(n)
0	11
1	6
2	-1
3	56
4	48
5	96
6	192
7	384
8	2816
9	1536
10	109568
11	10582016
12	12288
13	7429922816
14	64176128
15	4318724096
16	196608
17	60486975488
18	9388028592128
19	849566088298496
20	214058289594368
21	896029329195008

[11, 6, -1, 56, 48, 96, 192, 384, 2816, 1536, 109568, 10582016, 12288, 7429922816, 64176128, 4318724096, 196608, 60486975488, 9388028592128, 849566088298496, 214058289594368, 896029329195008]

cp's OEIS Frontend

A359492 a(n) is the least number of the form p^2 + q^2 - 2 for primes p and q that is an odd prime times 2^n, or -1 if there is no such number.

Table of values

List of values