%I A147925
%S A147925 1,2,6,24,74,312,1620,7876,44022,307314,2064562,15229866,132064084,
%T A147925 1095500280,10006003984,104500649736
%N A147925 Number of permutations of floor(i*4/3), i=0..n-1, with all sums of two 
               and three adjacent terms respectively unique.
%Y A147925 Sequence in context: A107761 A147943 A147934 this_sequence A147917 A147946 
               A147937
%Y A147925 Adjacent sequences: A147922 A147923 A147924 this_sequence A147926 A147927 
               A147928
%K A147925 nonn
%O A147925 1,2
%A A147925 Ron Hardin (rhhardin(AT)att.net) Nov 17 2008