%I A081851
%S A081851 5,7,36,1711985,13,15,1700,114,168,42000323,275,324,58,62,23658393,6055,
%T A081851 58311963,9321,121770,13760,135,141,1960,344148,5734229,3391007266515,
               8825709,
%U A081851 23546737390632357,244,252,1526332099115586230,105432399233,27538521,5680
%N A081851 Consider recurrence b(0) = (2n+1)/4, b(n) = b(0)*ceiling(b(n-1)); sequence 
               gives first integer reached (or -1 if no integer is ever reached).
%Y A081851 Cf. A073524, A081849, A081850.
%Y A081851 Sequence in context: A007911 A066172 A018353 this_sequence A006067 A147760 
               A154148
%Y A081851 Adjacent sequences: A081848 A081849 A081850 this_sequence A081852 A081853 
               A081854
%K A081851 nonn
%O A081851 2,1
%A A081851 N. J. A. Sloane (njas(AT)research.att.com), Apr 13 2003