%I #12 Jul 06 2015 23:40:51
%S 0,63,990,3822,15222,15738,15804,60858,62394,62940,224694,241110,
%T 241338,243162,243420,244188,249306,249318,249564,249660,251370,
%U 251628,251634,252396,252660,252792,964314,964326,965340,972522,972636,973548,976620,990678,995034,995046,997098,997212,998124,998130,1003242,1005420
%N Capless binary boundary codes for holeless strictly nonoverlapping polyhexes, only the maximal representative from each equivalence class obtained by rotating.
%C Indexing starts from zero, because a(0) = 0 is a special case, indicating an empty path, which thus ends at the same vertex as where it started from.
%H Antti Karttunen, <a href="/A258004/b258004.txt">Table of n, a(n) for n = 0..874</a>
%F a(n) = A053645(A258003(n)).
%e 63 ("111111" in binary) is present as it encodes a single hex. This is because when we walk in honeycomblattice from vertex to vertex, at each vertex turning to the same direction, we will return to the starting vertex after enclosing a hex with six such steps.
%o (Scheme)
%o (define (A258004 n) (A053645 (A258003 n)))
%Y Cf. A053645, A258003.
%Y Subsequence of A255561 and A258014.
%K nonn,base
%O 0,2
%A _Antti Karttunen_, May 16 2015
