cp's OEIS Frontend

A067343 Sum of decimal digits of n equals sum of decimal digits of sum of divisors of n.

%I A067343 #6 Dec 26 2013 05:39:32
%S A067343 1,15,24,64,69,78,90,114,133,147,153,186,198,258,270,276,288,306,339,
%T A067343 360,366,393,429,474,492,495,507,522,582,588,609,618,627,639,708,717,
%U A067343 738,762,763,801,817,834,846,871,906,933,960,978,990,1062,1080,1083
%N A067343 Sum of decimal digits of n equals sum of decimal digits of sum of divisors of n.
%F A067343 A067342(n) = A007953(A000203(n)) = A007953(n).
%o A067343 (PARI) sd(n) = digs = digits(n); sum(i=1, #digs, digs[i]);
%o A067343 isok(n) = sd(n) == sd(sigma(n)); \\ _Michel Marcus_, Dec 26 2013
%Y A067343 Cf. A067342, A007953, A000203.
%K A067343 base,nonn
%O A067343 1,2
%A A067343 _Labos Elemer_, Jan 16 2002