Search: id:A147435
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%I A147435
%S A147435 1,1,1,1,1,13,21,57,259,1017,4255,25913,160493,1488777,11698881,
%T A147435 154711435,1737788683,30091739925
%N A147435 Number of n X n binary arrays symmetric under 180 degree rotation with 
               all ones connected only in a 1010-1111-0101 pattern in any orientation.
%e A147435 Maximal 8 X 8 example
%e A147435 .1.0.1.0.0.0.1.1
%e A147435 .1.1.1.1.0.1.1.0
%e A147435 .0.1.0.1.0.0.1.1
%e A147435 .0.0.0.0.0.1.1.0
%e A147435 .0.1.1.0.0.0.0.0
%e A147435 .1.1.0.0.1.0.1.0
%e A147435 .0.1.1.0.1.1.1.1
%e A147435 .1.1.0.0.0.1.0.1
%Y A147435 Sequence in context: A137194 A053659 A066630 this_sequence A056512 A056523 
               A158998
%Y A147435 Adjacent sequences: A147432 A147433 A147434 this_sequence A147436 A147437 
               A147438
%K A147435 nonn
%O A147435 1,6
%A A147435 Ron Hardin (rhhardin(AT)att.net)

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