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 A207090 Number of 4Xn 0..1 arrays avoiding 0 0 0 horizontally and 0 0 1 vertically 1
 12, 144, 1117, 10621, 98824, 894720, 8244759, 75709453, 694032466, 6372084456, 58477847273, 536617596113, 4924871267328, 45196366353136, 414774195476647, 3806487479872457, 34932921065290570, 320586783126445036 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 4 of A207088 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = a(n-1) +28*a(n-2) +344*a(n-3) +816*a(n-4) +1294*a(n-5) -10338*a(n-6) -19356*a(n-7) -50027*a(n-8) +175117*a(n-9) +123758*a(n-10) +709272*a(n-11) -1835144*a(n-12) +318196*a(n-13) -5529708*a(n-14) +11398328*a(n-15) -5985344*a(n-16) +22648164*a(n-17) -37478232*a(n-18) +19283976*a(n-19) -44313168*a(n-20) +60601968*a(n-21) -20512576*a(n-22) +37990000*a(n-23) -47677312*a(n-24) +5766976*a(n-25) -13423872*a(n-26) +20094976*a(n-27) -238592*a(n-28) +1727488*a(n-29) -4091904*a(n-30) +18432*a(n-31) +331776*a(n-33) EXAMPLE Some solutions for n=4 ..0..0..1..1....1..1..0..0....0..1..0..0....1..1..0..1....1..0..0..1 ..1..1..1..1....0..0..1..1....0..0..1..0....1..1..0..1....0..1..1..0 ..0..1..1..1....1..1..0..0....0..1..0..0....0..1..0..0....1..0..1..1 ..0..1..1..0....1..0..0..1....0..0..1..0....0..1..0..0....1..1..1..1 CROSSREFS Sequence in context: A206885 A206890 A188758 * A189259 A189612 A207183 Adjacent sequences: A207087 A207088 A207089 * A207091 A207092 A207093 KEYWORD nonn AUTHOR R. H. Hardin Feb 15 2012 STATUS approved

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Last modified March 21 11:27 EDT 2023. Contains 361402 sequences. (Running on oeis4.)