A135371 a(n) = prime(3^(n + 1)) - prime(3^n).

3, 18, 80, 316, 1124, 3976, 13770, 46398, 155174, 512700, 1679218, 5454768, 17617664, 56578816, 180896064, 576041630, 1827788446, 5781493590, 18236550884, 57379347420, 180130119286, 564319058202, 1764618506934, 5508483994106, 17168384214168, 53431296170784

Offset: 0

Author

Marvin Ray Burns, Dec 09 2007

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 0..35 (calculated from the b-file at A038833)

Crossrefs

Cf. A000040, A038833, A110896, A135373.

Programs

Mathematica

Table[Prime[3^(n + 1)] - Prime[3^n], {n, 0, 26}]

PARI

a(n) = prime(3^(n + 1)) - prime(3^n); \\ Michel Marcus, Nov 15 2020

Formula

a(n) = A038833(n+1) - A038833(n). - Jinyuan Wang, Nov 14 2020

Extensions

a(23)-a(25) from Jinyuan Wang, Nov 14 2020