|
%I #7 Dec 15 2017 17:36:19
%S 6,37,1212,1530,5055,37680,98918163,149308749,250094358
%N 2n is equal to the sum of its divisors after the digits have been sorted in descending order (zeros dropped).
%e a(3)=1212 because the divisors of 1212 are [1, 2, 3, 4, 6, 12, 101, 202, 303, 404, 606, 1212] and 1+2+3+4+6+21+11+22+33+44+66+2211 = 2424 = 2*1212.
%K base,more,nonn
%O 1,1
%A _Jason Earls_, Jun 11 2003
%E 98918163, 149308749, 250094358 from _Sean A. Irvine_, Nov 19 2009
|
