A307329 - cp's OEIS frontend

A307329 Indices of twin Ulam primes: numbers k such that both u(k) and u(k+1) are primes, where u(k) = A002858(k) are the Ulam numbers.

n	a(n)
1	2
2	7
3	106
4	193
5	241
6	286
7	322
8	353
9	411
10	415
11	753
12	858
13	859
14	1086
15	1164
16	1305
17	1547
18	1548
19	1625
20	1631
21	1648
22	1678
23	1896
24	1972
25	2007
26	2103
27	2406
28	2503
29	2515
30	2516
31	2530
32	2553
33	2638
34	2714
35	3003
36	3059
37	3060
38	3337
39	3903
40	4012
41	4072
42	4299
43	4386
44	4404
45	4625
46	4698

[2, 7, 106, 193, 241, 286, 322, 353, 411, 415, 753, 858, 859, 1086, 1164, 1305, 1547, 1548, 1625, 1631, 1648, 1678, 1896, 1972, 2007, 2103, 2406, 2503, 2515, 2516, 2530, 2553, 2638, 2714, 3003, 3059, 3060, 3337, 3903, 4012, 4072, 4299, 4386, 4404, 4625, 4698]

cp's OEIS Frontend

A307329 Indices of twin Ulam primes: numbers k such that both u(k) and u(k+1) are primes, where u(k) = A002858(k) are the Ulam numbers.

Table of values

List of values