%I A112385
%S A112385 2,6,30,182,1224,8778,65780,508950,4034712,32602328,267535086,2223463866,
%T A112385 18676869400,158310871740,1352392098120,11631593739990,100637721972216,
%U A112385 875325840117960,7649219033276888,67126255864788120,591311470790795040
%N A112385 6*binomial(4*n-1,n-1)/(4*n-1).
%D A112385 Madeline Jones, The Mysterious Flexagons (1966).
%D A112385 M. Kosters, A theory of hexaflexagons, Nieuw Archief Wisk., 17 (1999), 
               349-362.
%H A112385 Vernon Gutenkunst, <a href="http://members.aol.com/verndrei/flexh01.html">
               Trailblazing Hexagons</a>
%Y A112385 Equals 2*A006632.
%Y A112385 Sequence in context: A096769 A111059 A009645 this_sequence A078700 A104561 
               A127482
%Y A112385 Adjacent sequences: A112382 A112383 A112384 this_sequence A112386 A112387 
               A112388
%K A112385 nonn
%O A112385 1,1
%A A112385 N. J. A. Sloane (njas(AT)research.att.com), Dec 05 2005