A133229 - cp's OEIS frontend

A133229 Smallest index-sum i+j such that prime(i) + prime(j) = 4*n^2. a(0)=-1 to indicate that there is no such pair of primes.

n	a(n)
0	-1
1	2
2	8
3	14
4	20
5	27
6	37
7	46
8	57
9	70
10	80
11	95
12	108
13	124
14	142
15	160
16	174
17	193
18	213
19	231
20	253
21	277
22	297
23	321
24	346
25	376
26	396
27	425
28	451
29	476
30	507
31	537
32	566
33	598
34	626
35	659
36	693
37	725
38	770
39	796
40	836
41	870
42	912
43	941
44	984
45	1022
46	1060
47	1103
48	1146
49	1187
50	1243
51	1277
52	1322
53	1366
54	1404
55	1449
56	1500
57	1553
58	1597
59	1648
60	1691
61	1746
62	1798

[-1, 2, 8, 14, 20, 27, 37, 46, 57, 70, 80, 95, 108, 124, 142, 160, 174, 193, 213, 231, 253, 277, 297, 321, 346, 376, 396, 425, 451, 476, 507, 537, 566, 598, 626, 659, 693, 725, 770, 796, 836, 870, 912, 941, 984, 1022, 1060, 1103, 1146, 1187, 1243, 1277, 1322, 1366, 1404, 1449, 1500, 1553, 1597, 1648, 1691, 1746, 1798]

cp's OEIS Frontend

A133229 Smallest index-sum i+j such that prime(i) + prime(j) = 4*n^2. a(0)=-1 to indicate that there is no such pair of primes.

Table of values

List of values