%I A074923
%S A074923 1,6,18,5,5,7,37,132,29,63,46,11,7,212,25,38,145,136,46,118,39,37,24,15,
%T A074923 19,85,211,179,249,266,190,87,259,216,16,70,210,56,255,94,143,244,482,
%U A074923 558,46,327,271,93,110,8,121,29,421,329,47,40,394,376,64,249,49,390,321
%N A074923 Number of steps to reach the first integer starting with prime(n+1)/prime(n) 
               and iterating the map x -> x*ceiling(x), or -1 if no integer is ever 
               reached.
%e A074923 a(4)=5 since A000040(4+1)/A000040(4)=11/7 -> 22/7 -> 88/7 -> 1144/7 -> 
               187616/7 -> 718381664.
%Y A074923 Cf. A073524, A000040.
%Y A074923 Sequence in context: A024080 A099436 A077022 this_sequence A093061 A078741 
               A129870
%Y A074923 Adjacent sequences: A074920 A074921 A074922 this_sequence A074924 A074925 
               A074926
%K A074923 nonn
%O A074923 1,2
%A A074923 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 04 2002
%E A074923 Extended by Max Alekseyev (maxale(AT)gmail.com), Jul 28 2009