Numbers n that raised to the powers from 1 to k (with k>=1) are multiples of the sum of their digits (n raised to k+1 must not be a multiple). Case k=17.
3900, 39000, 390000, 3900000, 12432420, 16528050, 19211220, 28845180
3 seqfan posts
Mon Aug 23 16:09:30 CEST 2010 [seqfan] Re: A135186-A135202: a(1)=1(?)