|
%I #10 Feb 27 2014 01:39:50
%S 3,7,11,15,23,27,31,35,39,43,47,59,63,67,71,75,79,83,87,95,103,107,
%T 111,115,119,123,131,135,139,143,147,155,159,167,171,175,179,183,187,
%U 191,195,203,207,211,215,219,223,227,231,239,247,255,259,263,267,275,279
%N Even squarefree numbers plus 1.
%F a(n) = A039956(n) + 1.
%e 10 is an even squarefree number, so 11 is in this list.
%p with(numtheory): a := proc (n) if issqrfree(2*n) = true then 2*n+1 else end if end proc: seq(a(n), n = 1 .. 150); # _Emeric Deutsch_, Jun 20 2009
%Y Cf. A005117.
%K easy,nonn
%O 1,1
%A _Ben Paul Thurston_, May 26 2009
%E More terms from _Emeric Deutsch_, Jun 20 2009
|
