A181551 The largest k corresponding to n=A181542(.) such that 3^n-3^k-1 and 3^n-3^k+1 are twin primes.

1, 2, 2, 6, 10, 15, 17, 22, 30, 42, 100, 77, 96, 103, 120, 94, 141, 206, 339, 548, 843, 1409, 978, 1198, 1920, 2837, 5377

Offset

1,2

Links

Table of n, a(n) for n=1..27.

Crossrefs

Cf. A181515, A181523, A181542

Sequence in context: A080460 A080456 A077017 * A362934 A127404 A292037

Adjacent sequences: A181548 A181549 A181550 * A181552 A181553 A181554

Keyword

nonn

Author

Pierre CAMI, Jan 29 2011

Status

approved