A213882 - cp's OEIS frontend

A213882 Numbers b such that there is at least one number c and one single-digit number d such that (10^c-d)10^b-1 and (10^c-d)10^b+1 are twin primes with 0 < c < 2*b.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	13
11	14
12	15
13	19
14	21
15	23
16	26
17	40
18	43
19	45
20	52
21	54
22	55
23	69
24	77
25	90
26	99
27	106
28	128
29	147
30	176
31	202
32	267
33	331
34	458
35	512
36	555
37	908
38	942
39	1004
40	1123
41	1374
42	1386
43	1467

[1, 2, 3, 4, 5, 6, 7, 8, 9, 13, 14, 15, 19, 21, 23, 26, 40, 43, 45, 52, 54, 55, 69, 77, 90, 99, 106, 128, 147, 176, 202, 267, 331, 458, 512, 555, 908, 942, 1004, 1123, 1374, 1386, 1467]

cp's OEIS Frontend

A213882 Numbers b such that there is at least one number c and one single-digit number d such that (10^c-d)10^b-1 and (10^c-d)10^b+1 are twin primes with 0 < c < 2*b.

Table of values

List of values

cp's OEIS Frontend

A213882 Numbers b such that there is at least one number c and one single-digit number d such that (10^c-d)*10^b-1 and (10^c-d)*10^b+1 are twin primes with 0 < c < 2*b.

Table of values

List of values

A213882 Numbers b such that there is at least one number c and one single-digit number d such that (10^c-d)10^b-1 and (10^c-d)10^b+1 are twin primes with 0 < c < 2*b.