A175523 - cp's OEIS frontend

A175523 a(n)=a(n-1)+ p, where p is the least prime whose first digit equals the first digit of a(n-1) and p>=a(n-1).

n	a(n)
1	1
2	12
3	25
4	54
5	113
6	226
7	453
8	910
9	1821
10	3644
11	7303
12	14610
13	29231
14	58462
15	116939
16	233892
17	467803
18	935616
19	1871237
20	3742486
21	7484979
22	14969998
23	29939999
24	59880012
25	119760031
26	239520072
27	479040191
28	958080388
29	1916160779
30	3832321566

[1, 12, 25, 54, 113, 226, 453, 910, 1821, 3644, 7303, 14610, 29231, 58462, 116939, 233892, 467803, 935616, 1871237, 3742486, 7484979, 14969998, 29939999, 59880012, 119760031, 239520072, 479040191, 958080388, 1916160779, 3832321566]

cp's OEIS Frontend

A175523 a(n)=a(n-1)+ p, where p is the least prime whose first digit equals the first digit of a(n-1) and p>=a(n-1).

Table of values

List of values