%I A056452
%S A056452 6,6,36,36,216,216,1296,1296,7776,7776,46656,46656,279936,279936,
%T A056452 1679616,1679616,10077696,10077696,60466176,60466176,362797056,
%U A056452 362797056,2176782336,2176782336,13060694016,13060694016,78364164096
%N A056452 Palindromes using a maximum of six different symbols.
%D A056452 M. R. Nester (1999). Mathematical investigations of some plant interaction 
               designs. PhD Thesis. University of Queensland, Brisbane, Australia.
%F A056452 6^[(n+1)/2].
%p A056452 A056452:=n->6^floor((n+1)/2);
%Y A056452 Cf. A016116.
%Y A056452 Sequence in context: A111437 A056464 A056454 this_sequence A038260 A165424 
               A156099
%Y A056452 Adjacent sequences: A056449 A056450 A056451 this_sequence A056453 A056454 
               A056455
%K A056452 nonn,base
%O A056452 1,1
%A A056452 Marks R. Nester (nesterm(AT)dpi.qld.gov.au)