A161536 a(1)=1. a(n) = the smallest integer > a(n-1) that is an (odd) palindrome when written in binary, and is such that (a(n)-a(n-1))/2 is prime.

1, 5, 9, 15, 21, 27, 31, 45, 51, 65, 99, 257, 403, 561, 1675, 2289, 6731, 8385, 24707, 34209, 98947, 131073, 394499, 526593, 1577219, 2097153, 6298627, 8394753, 25197571, 33554433, 100683779, 134254593, 402896899, 536944641, 1610752003

Offset

1,2

Links

Chai Wah Wu, Table of n, a(n) for n = 1..68

Crossrefs

Sequence in context: A315076 A350472 A315077 * A315078 A315079 A217277

Adjacent sequences: A161533 A161534 A161535 * A161537 A161538 A161539

Keyword

base,nonn

Author

Leroy Quet, Jun 13 2009

Extensions

More terms from Sean A. Irvine, Nov 25 2009

Status

approved