An "extremely strange sequence": a(n+1) = [ A*a(n)+B ]/p^r, where p^r is the highest power of p diving [ A*a(n)+B ] and p=2, A=4.001, B=1.2.
1, 5, 21, 85, 341, 1365, 2731, 10927, 5465, 10933, 1367, 2735, 10943, 5473, 10949
3 seqfan posts
Tue Jun 12 19:19:51 CEST 2012 [seqfan] Re: 8/5 Sequence