A161397 a(n) = the smallest positive integer that contains the same number of (non-leading) 0's as n when a(n) and n are written in binary, is not coprime to n, and is not a divisor of n.

6, 15, 10, 30, 14, 63, 18, 12, 4, 55, 9, 247, 6, 63, 34, 85, 8, 57, 8, 9, 4, 253, 18, 10, 4, 6, 10, 1015, 14, 1023, 66, 36, 16, 20, 16, 185, 8, 9, 16, 205, 8, 215, 8, 10, 4, 14335, 33, 35, 8, 9, 8, 159, 4, 30, 18, 9, 4, 767, 9, 4087, 6, 15, 130, 80, 32, 201, 32, 33, 16, 213, 32, 730

Offset

2,1

Links

H. v. Eitzen, Table of n, a(n) for n = 2..10000.

Crossrefs

Cf. A145257, A161396.

Sequence in context: A123623 A240990 A215739 * A145257 A245200 A070555

Adjacent sequences: A161394 A161395 A161396 * A161398 A161399 A161400

Keyword

base,nonn

Author

Leroy Quet, Jun 09 2009

Extensions

a(1) is undefined; offset corrected by Hagen von Eitzen, Jun 20 2009

Corrected and extended using terms from b-file. - N. J. A. Sloane, Aug 31 2009

Status

approved