A091013 - OEIS

%I #3 Mar 30 2012 18:50:43

%S 12,18,24,30,36,42,45,48,54,56,60,66,72,75,78,80,84,90,96,102,105,108,

%T 112,114,120,126,132,135,138,140,144,150,156,160,162,165,168,174,180,

%U 182,186,192,195,196,198,200,204,210,216,222,224,225,228,231,234,240

%N Numbers having more than one divisor d such that for some x also d-x and d+x are divisors.

%C A091009(a(n)) > 1.

%Y Cf. A091012, A091011, A091010.

%K nonn

%O 1,1

%A _Reinhard Zumkeller_, Dec 13 2003