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A189108
Number of nX6 binary arrays without the pattern 1 1 0 diagonally or antidiagonally
1
64, 4096, 103684, 2515396, 49561600, 953574400, 17821182016, 332070977536, 6138818896896, 113361334648384, 2090692589224464, 38552909380706704, 710693511096960000, 13100455249871650816, 241471801824194480400
OFFSET
1,1
COMMENTS
Column 6 of A189111
LINKS
FORMULA
Empirical: a(n) = 19*a(n-1) +38*a(n-2) -840*a(n-3) +2469*a(n-4) -64989*a(n-5) -160802*a(n-6) +2908798*a(n-7) +12912486*a(n-8) -55150046*a(n-9) -211462940*a(n-10) +441820472*a(n-11) -4366801066*a(n-12) +14780399918*a(n-13) +99880178148*a(n-14) -363416438284*a(n-15) +237861645155*a(n-16) +924183211627*a(n-17) -11352889252898*a(n-18) +28641804739480*a(n-19) +31167464051169*a(n-20) -241175685110629*a(n-21) +8889439317582*a(n-22) +1647701546368518*a(n-23) -1639852023292064*a(n-24) -6955912413885280*a(n-25) +37037535512507392*a(n-26) -58467724390706216*a(n-27) -39141596878507140*a(n-28) +268410773107976724*a(n-29) -287512536176168760*a(n-30) -857419640781811000*a(n-31) +1350873237269021808*a(n-32) +3523842992368799696*a(n-33) -22243961745614607968*a(n-34) +42450949173851776896*a(n-35) +2767319825058192304*a(n-36) -125176914231928296560*a(n-37) +377666384500748072352*a(n-38) -375251256711467371232*a(n-39) -321456961505761412480*a(n-40) +544132542952936149376*a(n-41) -810461054628234509568*a(n-42) -401193273831888932480*a(n-43) +3025299093755536489024*a(n-44) +3348516166496523379904*a(n-45) -11427745661352681967744*a(n-46) +10552131404883070133120*a(n-47) -4741375680337702573056*a(n-48) -11167814021981070198272*a(n-49) +19477108875028433304576*a(n-50) +20792598195674895393792*a(n-51) -52295516939922751003648*a(n-52) -23864374538183678673920*a(n-53) +80982209546264868558848*a(n-54) -18027700209680676972544*a(n-55) -32864758209346935234560*a(n-56) +19602574814250067263488*a(n-57) +15236680237137672306688*a(n-58) +3163671735777662107648*a(n-59) -43458546728763940798464*a(n-60) -9462184266220767543296*a(n-61) +53954257347168926433280*a(n-62) -15809789557609214771200*a(n-63) -17669011500698423001088*a(n-64) +24478618784945397563392*a(n-65) -10878420761994116202496*a(n-66) -4529381466974831247360*a(n-67) +2416313115735402479616*a(n-68) -536909763439459565568*a(n-69) -182074749890510979072*a(n-70) +748451443445141078016*a(n-71) -117265899438861189120*a(n-72) +361111842842266828800*a(n-73) -67992038631882620928*a(n-74) +45767603743094734848*a(n-75) +1093581514890805248*a(n-76) +170428288034930688*a(n-77) -876488338465357824*a(n-78)
EXAMPLE
Some solutions for 3X6
..1..0..0..1..0..1....0..1..0..1..1..0....0..0..0..0..1..1....0..0..0..0..1..1
..0..1..0..1..1..0....1..0..1..1..0..1....0..0..0..0..0..1....1..0..1..0..1..1
..1..0..1..1..0..1....0..1..1..1..0..0....0..0..1..0..1..1....1..1..0..1..0..0
CROSSREFS
Sequence in context: A189114 A223877 A188907 * A223802 A297379 A283862
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 16 2011
STATUS
approved