%I A051340
%S A051340 1,1,2,1,1,3,1,1,1,4,1,1,1,1,5,1,1,1,1,1,6,1,1,1,1,1,1,7,1,1,1,1,1,
%T A051340 1,1,8,1,1,1,1,1,1,1,1,9,1,1,1,1,1,1,1,1,1,10,1,1,1,1,1,1,1,1,1,1,
%U A051340 11,1,1,1,1,1,1,1,1,1,1,1,12,1,1,1,1,1,1,1,1,1,1,1,1,13,1,1,1,1,1,1
%N A051340 A simple 2-dimensional array, read by antidiagonals.
%D A051340 A. V. Mikhalev and A. A. Nechaev, Linear recurring sequences over modules, 
               Acta Applic. Math., 42 (1996), 161-202.
%F A051340 For n>0, a(n(n+3)/2)=n if k is not of form n*(n+3)/2 a(k)=1 - Benoit 
               Cloitre (benoit7848c(AT)orange.fr), Oct 31 2002
%Y A051340 Sequence in context: A080209 A127949 A167407 this_sequence A165430 A164823 
               A167269
%Y A051340 Adjacent sequences: A051337 A051338 A051339 this_sequence A051341 A051342 
               A051343
%K A051340 easy,nice,nonn,tabl
%O A051340 0,3
%A A051340 N. J. A. Sloane (njas(AT)research.att.com).