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A207491 Number of 6 X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 1 1 and 1 1 0 vertically. 1
22, 484, 942, 3947, 12151, 26980, 73325, 170276, 397692, 935992, 2150515, 5001837, 11588452, 26898291, 62652794, 146079354, 341212080, 797873693, 1867537041, 4374817504, 10252438677, 24034757838, 56361090296, 132187700546 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 6 of A207488.
LINKS
FORMULA
Empirical: a(n) = 2*a(n-1) +3*a(n-2) +12*a(n-3) -33*a(n-4) -44*a(n-5) -86*a(n-6) +253*a(n-7) +407*a(n-8) +498*a(n-9) -1384*a(n-10) -2637*a(n-11) -2244*a(n-12) +6286*a(n-13) +12205*a(n-14) +7016*a(n-15) -23663*a(n-16) -40932*a(n-17) -14110*a(n-18) +70545*a(n-19) +101985*a(n-20) +15225*a(n-21) -163031*a(n-22) -193527*a(n-23) +3004*a(n-24) +291445*a(n-25) +285598*a(n-26) -42248*a(n-27) -405542*a(n-28) -334195*a(n-29) +81539*a(n-30) +443779*a(n-31) +315209*a(n-32) -95416*a(n-33) -385988*a(n-34) -241702*a(n-35) +79851*a(n-36) +268799*a(n-37) +150149*a(n-38) -51102*a(n-39) -149967*a(n-40) -74362*a(n-41) +25852*a(n-42) +66535*a(n-43) +28625*a(n-44) -10424*a(n-45) -23158*a(n-46) -8295*a(n-47) +3313*a(n-48) +6219*a(n-49) +1737*a(n-50) -808*a(n-51) -1263*a(n-52) -248*a(n-53) +144*a(n-54) +188*a(n-55) +22*a(n-56) -17*a(n-57) -19*a(n-58) -a(n-59) +a(n-60) +a(n-61).
EXAMPLE
Some solutions for n=4
..1..1..1..1....0..1..0..1....0..1..0..1....1..0..0..1....1..0..1..0
..0..0..1..0....0..1..0..0....1..0..0..1....0..1..0..1....0..0..1..0
..1..0..1..0....1..1..0..0....0..1..0..1....1..0..0..1....0..0..1..0
..0..0..1..0....0..1..0..0....1..0..0..1....0..1..0..1....0..0..1..0
..0..0..1..0....0..1..0..1....0..1..0..1....1..0..0..1....1..1..1..0
..0..0..1..0....1..1..0..0....1..0..0..1....0..1..0..1....0..0..1..0
CROSSREFS
Cf. A207488.
Sequence in context: A158535 A171327 A077421 * A207888 A208111 A208843
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 18 2012
STATUS
approved

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Last modified May 27 19:58 EDT 2024. Contains 372882 sequences. (Running on oeis4.)