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%I #5 Mar 31 2012 12:37:15
%S 14,196,966,4536,24304,111426,468348,1992996,8204200,32364700,
%T 126207438,485459784,1829249768,6809144730,25110435922,91539487000,
%U 330608108182,1185426647902,4218712592850,14911669509057,52409625818926
%N Number of 7Xn 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically
%C Row 7 of A207068
%H R. H. Hardin, <a href="/A207074/b207074.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 13*a(n-1) -77*a(n-2) +383*a(n-3) -1936*a(n-4) +7922*a(n-5) -28256*a(n-6) +103017*a(n-7) -335295*a(n-8) +972967*a(n-9) -2898437*a(n-10) +7966108*a(n-11) -19695289*a(n-12) +50590479*a(n-13) -121311483*a(n-14) +261567751*a(n-15) -598810479*a(n-16) +1278613877*a(n-17) -2435180257*a(n-18) +5103796480*a(n-19) -9830453100*a(n-20) +16639266482*a(n-21) -32810735226*a(n-22) +57338491218*a(n-23) -86327093442*a(n-24) +165368021800*a(n-25) -261215742290*a(n-26) +348609720526*a(n-27) -675060737155*a(n-28) +947076002811*a(n-29) -1114104267547*a(n-30) +2291266909445*a(n-31) -2752950138758*a(n-32) +2846776029030*a(n-33) -6591178122692*a(n-34) +6378804191029*a(n-35) -5860717529743*a(n-36) +16246332680119*a(n-37) -11492394343561*a(n-38) +9831250373548*a(n-39) -34372580178341*a(n-40) +15047096292563*a(n-41) -13775536083585*a(n-42) +62011759601185*a(n-43) -11209722202073*a(n-44) +16941038227703*a(n-45) -94239166030921*a(n-46) -4304990908984*a(n-47) -19443731342848*a(n-48) +118797207702512*a(n-49) +27461057092152*a(n-50) +21121113946208*a(n-51) -122114528749824*a(n-52) -45290805108400*a(n-53) -20290807770736*a(n-54) +100417788663552*a(n-55) +46418065916544*a(n-56) +15492754380096*a(n-57) -64466394516288*a(n-58) -32418504516096*a(n-59) -8453846568960*a(n-60) +31216358866176*a(n-61) +15231769369344*a(n-62) +2924248780800*a(n-63) -10776946268160*a(n-64) -4459567104000*a(n-65) -474099609600*a(n-66) +2364899328000*a(n-67) +658409472000*a(n-68) -268738560000*a(n-70)
%e Some solutions for n=4
%e ..1..0..1..1....0..0..0..0....1..0..0..0....0..1..1..1....0..1..1..1
%e ..1..0..0..0....1..0..0..0....1..0..0..0....1..1..0..0....1..1..1..1
%e ..1..0..0..0....1..0..0..0....0..0..0..0....1..1..0..0....1..1..1..1
%e ..0..0..0..0....0..0..0..0....0..0..0..0....1..0..0..0....1..1..1..1
%e ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....1..1..1..1
%e ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..1..1..1
%e ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..1..1..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 14 2012
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