A135546 - cp's OEIS frontend

A135546 Let p be the n-th prime and let g be the order of 2 mod p (see A014664). Then if g is even, a(n) = p*(2^(g/2) - 1), otherwise a(n) = 2^g - 1.

n	a(n)
2	3
3	15
4	7
5	341
6	819
7	255
8	9709
9	2047
10	475107
11	31
12	9699291
13	41943
14	5461
15	8388607
16	3556769739
17	31675383749
18	65498251203
19	575525617597
20	34359738367
21	511
22	549755813887
23	182518930210733
24	2047
25	1627389855
26	113715890591104923
27	2251799813685247
28	963770320257286037

[3, 15, 7, 341, 819, 255, 9709, 2047, 475107, 31, 9699291, 41943, 5461, 8388607, 3556769739, 31675383749, 65498251203, 575525617597, 34359738367, 511, 549755813887, 182518930210733, 2047, 1627389855, 113715890591104923, 2251799813685247, 963770320257286037]

cp's OEIS Frontend

A135546 Let p be the n-th prime and let g be the order of 2 mod p (see A014664). Then if g is even, a(n) = p*(2^(g/2) - 1), otherwise a(n) = 2^g - 1.

Table of values

List of values