A359439 - cp's OEIS frontend

A359439 a(n) is the least number of the form p^2 + q^2 - 2 for primes p and q that is an odd multiple of 2^n, or -1 if there is no such number.

n	a(n)
0	11
1	6
2	-1
3	56
4	16
5	32
6	192
7	128
8	2816
9	1536
10	15360
11	30720
12	12288
13	73728
14	147456
15	32768
16	196608
17	1179648
18	22806528
19	11010048
20	34603008
21	31457280
22	314572800
23	679477248
24	50331648
25	301989888
26	1006632960
27	10871635968
28	20132659200
29	4831838208
30	28991029248
31	173946175488
32	450971566080
33	77309411328

[11, 6, -1, 56, 16, 32, 192, 128, 2816, 1536, 15360, 30720, 12288, 73728, 147456, 32768, 196608, 1179648, 22806528, 11010048, 34603008, 31457280, 314572800, 679477248, 50331648, 301989888, 1006632960, 10871635968, 20132659200, 4831838208, 28991029248, 173946175488, 450971566080, 77309411328]

cp's OEIS Frontend

A359439 a(n) is the least number of the form p^2 + q^2 - 2 for primes p and q that is an odd multiple of 2^n, or -1 if there is no such number.

Table of values

List of values