A073579 - cp's OEIS frontend

A073579 Signed primes: if prime(n) even, a(n) = 0; if prime(n) == 1 (mod 4), a(n) = prime(n); if prime(n) == -1 (mod 4), a(n) = -prime(n).

n	a(n)
1	0
2	-3
3	5
4	-7
5	-11
6	13
7	17
8	-19
9	-23
10	29
11	-31
12	37
13	41
14	-43
15	-47
16	53
17	-59
18	61
19	-67
20	-71
21	73
22	-79
23	-83
24	89
25	97
26	101
27	-103
28	-107
29	109
30	113
31	-127
32	-131
33	137
34	-139
35	149
36	-151
37	157
38	-163
39	-167
40	173
41	-179
42	181
43	-191
44	193
45	197
46	-199
47	-211
48	-223
49	-227
50	229
51	233
52	-239

[0, -3, 5, -7, -11, 13, 17, -19, -23, 29, -31, 37, 41, -43, -47, 53, -59, 61, -67, -71, 73, -79, -83, 89, 97, 101, -103, -107, 109, 113, -127, -131, 137, -139, 149, -151, 157, -163, -167, 173, -179, 181, -191, 193, 197, -199, -211, -223, -227, 229, 233, -239]

cp's OEIS Frontend

A073579 Signed primes: if prime(n) even, a(n) = 0; if prime(n) == 1 (mod 4), a(n) = prime(n); if prime(n) == -1 (mod 4), a(n) = -prime(n).

Table of values

List of values