A160901 - OEIS

%I #7 Mar 11 2014 01:32:31

%S 18,14,34,39,26,28,30,63,66,50,52,87,54,56,115,58,111,60,62,130,135,

%T 98,285,100,102,159,104,106,108,183,110,112,399,114,207,116,118,375,

%U 120,231,122,124,126,255,258,525,194,196,279,198,200,202,303,204,623,206

%N a(n) = the smallest positive integer that is neither a multiple of c(n) nor is coprime to c(n), and is such that binary c(n) is a subsequence of a(n) written in binary; where c(n) = the n-th composite number.

%C Only composites indexes are considered here because there are no positive integers that are neither coprime to, nor a multiple of, the primes or 1.

%Y Cf. A002808.

%K base,nonn

%O 1,1

%A _Leroy Quet_, May 29 2009

%E Extended by _Ray Chandler_, Jun 14 2009