Search: id:A144241
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%I A144241
%S A144241 1,2,1,3,2,4,4,13,10,65,30,231,168,1370,1317,17525,10846,191939,133498,
%T A144241 2802218,2431795,73051050,54458173,2202863847,1575946900,84041510893,
%U A144241 69906212126,5035951361562,4061748253676,385626222267420
%N A144241 Number of n X n binary arrays, symmetric about the diagonal and under 
               90 degree rotation, with every 1 adjacent to at least one other 1 
               both bishopwise and rookwise but with no three 1s in a row bishopwise 
               or rookwise.
%Y A144241 Sequence in context: A159072 A116928 A034391 this_sequence A094173 A026272 
               A022447
%Y A144241 Adjacent sequences: A144238 A144239 A144240 this_sequence A144242 A144243 
               A144244
%K A144241 nonn
%O A144241 1,2
%A A144241 Ron Hardin (rhhardin(AT)att.net), Sep 15 2008

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