A102751 - cp's OEIS frontend

A102751 Numbers k such that 1 + (k-1)^2 and ((k-1)/2)^2 + ((k+1)/2)^2 = (1/2)*(k^2+1) are primes.

n	a(n)
1	3
2	5
3	11
4	15
5	25
6	85
7	95
8	121
9	131
10	171
11	181
12	205
13	231
14	261
15	271
16	315
17	441
18	445
19	471
20	545
21	571
22	595
23	715
24	751
25	781
26	861
27	921
28	951
29	1011
30	1055
31	1081
32	1095
33	1125
34	1151
35	1185
36	1315
37	1411
38	1421
39	1495
40	1615
41	1661
42	1701
43	2035
44	2051
45	2055
46	2065
47	2175
48	2261
49	2315

[3, 5, 11, 15, 25, 85, 95, 121, 131, 171, 181, 205, 231, 261, 271, 315, 441, 445, 471, 545, 571, 595, 715, 751, 781, 861, 921, 951, 1011, 1055, 1081, 1095, 1125, 1151, 1185, 1315, 1411, 1421, 1495, 1615, 1661, 1701, 2035, 2051, 2055, 2065, 2175, 2261, 2315]

cp's OEIS Frontend

A102751 Numbers k such that 1 + (k-1)^2 and ((k-1)/2)^2 + ((k+1)/2)^2 = (1/2)*(k^2+1) are primes.

Table of values

List of values