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Numbers n such that the perfect deficiency of n (A109883) is prime.
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%I #3 Dec 15 2017 17:36:51

%S 3,9,10,12,25,30,36,49,50,60,70,81,121,126,136,144,150,210,225,289,

%T 324,330,338,350,390,462,484,490,510,660,676,690,750,770,780,784,800,

%U 841,961,1058,1089,1156,1190,1225,1250,1380,1470,1500,1610,1650,1682,1750

%N Numbers n such that the perfect deficiency of n (A109883) is prime.

%C Consecutive terms are 9,10 and 49,50. Are there any more?

%K easy,nonn

%O 1,1

%A _Jason Earls_, Jul 12 2005