a(n) starts arithmetic progression of n terms separated by tau(a(n)), each term having the same number of divisors
1, 3, 3, 60, 60, 201, 481, 5989, 3122037, 4434429, 13576837, 183894465
1 seqfan posts
Mon Sep 21 14:30:57 CEST 2009 [seqfan] The mapping k -> k + tau(k)