A167886 - OEIS

%I #4 Mar 30 2012 18:52:35

%S 2,3,3,7,11,15,21,27,31,34,39,45,51,55,60,63,68,75,78,83,87,100,103,

%T 109,119,125,130,133,138,144,154,159,171,182,185,189,195,205,209,214,

%U 220,226,230,239,252,256,260,273,278,287,291,296,303,308,313,315,320,327

%N n-th single or isolated number minus n-th non-single or nonisolated number.

%F a(n)=A167706(n)-A167707(n).

%e a(1)=2-0=2, a(2)=4-1=3, a(3)=6-3=3, a(4)=12-5=7.

%Y Cf. A167706, A167707.

%K nonn

%O 1,1

%A _Juri-Stepan Gerasimov_, Nov 14 2009

%E All numbers > 68 corrected by _R. J. Mathar_, May 30 2010