A071261 Smallest k such that |p(k)-c(k)| is an n-digit number where p(k) is the k-th prime and c(k) is the k-th composite number.

1, 10, 37, 206, 1401, 10626, 85316, 712597, 6117420, 53593619, 476889480, 4295913223, 39084524707, 358521889961, 3311439169717, 30765562102926, 287282165065268, 2694418859703791, 25368958219747617

Offset

1,2

Links

Table of n, a(n) for n=1..19.

Crossrefs

Cf. A038529.

Sequence in context: A110528 A208674 A137280 * A373619 A129426 A215881

Adjacent sequences: A071258 A071259 A071260 * A071262 A071263 A071264

Keyword

hard,more,nonn,base

Author

Amarnath Murthy, May 30 2002

Extensions

Corrected and extended by Gabriel Cunningham (gcasey(AT)mit.edu), Apr 08 2003

More terms from Sean A. Irvine, Nov 30 2009

a(12)-a(15) from Donovan Johnson, Dec 30 2010

a(16)-a(19) from Chai Wah Wu, Apr 17 2018

Status

approved