%I A035930
%S A035930 0,0,0,0,0,0,0,0,0,0,0,1,2,3,4,5,6,7,8,9,0,2,4,6,8,10,12,14,16,18,0,3,
               6,9,12,15,18,21,24,27,0,
%T A035930 4,8,12,16,20,24,28,32,36,0,5,10,15,20,25,30,35,40,45,0,6,12,18,24,30,
               36,42,48,54,0,7,14,21,28,
%U A035930 35,42,49,56,63,0,8,16,24,32,40,48,56,64,72,0,9,18,27,36,45,54,63,72,81,
               0,10,20,30,40,50,60,70
%N A035930 Maximal product of any two numbers whose concatenation is n.
%H A035930 Alois P. Heinz, <a href="b035930.txt">Table of n, a(n) for n = 0..9999</
               a>
%e A035930 a(341)=max(34*1,3*41)=123.
%p A035930 a:= proc(n) local l, m; l:= convert (n, base, 10); m:= nops(l); `if` 
               (m<2, 0, max (seq (parse (cat (seq (l[m-i], i=0..j-1))) *parse (cat 
               (seq (l[m-i], i=j..m-1))), j=1..m))) end: seq (a(n), n=0..120); [From 
               Alois P. Heinz (heinz(AT)hs-heilbronn.de), May 22 2009]
%Y A035930 Different from A007954. Cf. A035931-A035935.
%Y A035930 Sequence in context: A088118 A088117 A080464 this_sequence A139281 A059707 
               A056967
%Y A035930 Adjacent sequences: A035927 A035928 A035929 this_sequence A035931 A035932 
               A035933
%K A035930 nonn,base,nice
%O A035930 0,13
%A A035930 Erich Friedman (erich.friedman(AT)stetson.edu)
%E A035930 An erroneous formula was deleted by N. J. A. Sloane (njas(AT)research.att.com), 
               Dec 23 2008