A224223 - cp's OEIS frontend

A224223 a(0)=2; for n>0, a(n) = smallest prime not occurring earlier in the sequence such that a(n-1)+a(n) is a multiple of n^2. If no such prime exists, the sequence terminates.

n	a(n)
0	2
1	3
2	5
3	13
4	19
5	31
6	41
7	449
8	127
9	197
10	103
11	139
12	149
13	1879
14	277
15	173
16	83
17	5119
18	389
19	1777
20	223
21	659
22	1277
23	839
24	313
25	937
26	1091
27	367
28	1201
29	5527
30	773
31	4993
32	1151
33	7561
34	2843
35	4507
36	677
37	4799
38	977
39	5107
40	4493
41	15679
42	7253
43	26029
44	3011
45	1039
46	5309
47	3527

[2, 3, 5, 13, 19, 31, 41, 449, 127, 197, 103, 139, 149, 1879, 277, 173, 83, 5119, 389, 1777, 223, 659, 1277, 839, 313, 937, 1091, 367, 1201, 5527, 773, 4993, 1151, 7561, 2843, 4507, 677, 4799, 977, 5107, 4493, 15679, 7253, 26029, 3011, 1039, 5309, 3527]

cp's OEIS Frontend

A224223 a(0)=2; for n>0, a(n) = smallest prime not occurring earlier in the sequence such that a(n-1)+a(n) is a multiple of n^2. If no such prime exists, the sequence terminates.

Table of values

List of values