A152609 - cp's OEIS frontend

A152609 a(1) = 1; thereafter a(n) is always the smallest integer > a(n-1) not leading to a contradiction, such that the concatenation of any four consecutive digits in the sequence is a prime.

n	a(n)
1	1
2	2
3	3
4	7
5	19
6	31
7	91
8	373
9	931
10	1931
11	1933
12	7193
13	11931
14	19311
15	93119
16	311931
17	913733
18	1373313
19	7331373
20	9311931
21	19311931
22	19311933
23	71931193
24	119311931
25	193119311
26	931193119
27	3119311931
28	9137331373
29	9311931193

[1, 2, 3, 7, 19, 31, 91, 373, 931, 1931, 1933, 7193, 11931, 19311, 93119, 311931, 913733, 1373313, 7331373, 9311931, 19311931, 19311933, 71931193, 119311931, 193119311, 931193119, 3119311931, 9137331373, 9311931193]

cp's OEIS Frontend

A152609 a(1) = 1; thereafter a(n) is always the smallest integer > a(n-1) not leading to a contradiction, such that the concatenation of any four consecutive digits in the sequence is a prime.

Table of values

List of values