A131260 - cp's OEIS frontend

A131260 a(n) is the least palindrome > a(n-1) such that a(1) + a(2) + ... + a(n) is a semiprime.

n	a(n)
1	4
2	5
3	6
4	7
5	11
6	22
7	66
8	88
9	202
10	212
11	242
12	272
13	404
14	444
15	464
16	474
17	595
18	656
19	707
20	757
21	777
22	808
23	828
24	838
25	868
26	888
27	969
28	989
29	1111
30	1881
31	2222
32	2772
33	3553
34	4444
35	5005
36	5335
37	5555
38	5665
39	5995
40	6006
41	6556
42	6886
43	8448
44	8668
45	8888
46	9229
47	9339
48	10601

[4, 5, 6, 7, 11, 22, 66, 88, 202, 212, 242, 272, 404, 444, 464, 474, 595, 656, 707, 757, 777, 808, 828, 838, 868, 888, 969, 989, 1111, 1881, 2222, 2772, 3553, 4444, 5005, 5335, 5555, 5665, 5995, 6006, 6556, 6886, 8448, 8668, 8888, 9229, 9339, 10601]

cp's OEIS Frontend

A131260 a(n) is the least palindrome > a(n-1) such that a(1) + a(2) + ... + a(n) is a semiprime.

Table of values

List of values