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 A231135 Number of (n+1)X(4+1) black-square subarrays of 0..2 arrays with no element equal to a strict majority of its diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order 1
 16, 182, 2260, 27171, 336004, 4066129, 50257244, 608468617, 7520563372, 91054483047, 1125418461348, 13625913937795, 168414092245220, 2039060342079409, 25202456511185596, 305136757252909097 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A231137 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 175*a(n-2) -4017*a(n-4) +34311*a(n-6) -146236*a(n-8) +322472*a(n-10) -291040*a(n-12) +116032*a(n-14) -24064*a(n-16) +1024*a(n-18) EXAMPLE Some solutions for n=4 ..x..0..x..1..x....x..0..x..1..x....x..0..x..1..x....x..0..x..0..x ..0..x..2..x..0....1..x..0..x..2....2..x..0..x..1....0..x..1..x..2 ..x..1..x..0..x....x..2..x..2..x....x..2..x..0..x....x..2..x..2..x ..1..x..1..x..1....0..x..1..x..0....1..x..1..x..2....1..x..1..x..1 ..x..2..x..0..x....x..0..x..2..x....x..2..x..1..x....x..2..x..0..x CROSSREFS Sequence in context: A199018 A204608 A279282 * A230992 A016298 A288720 Adjacent sequences: A231132 A231133 A231134 * A231136 A231137 A231138 KEYWORD nonn AUTHOR R. H. Hardin, Nov 04 2013 STATUS approved

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Last modified May 29 07:13 EDT 2023. Contains 363029 sequences. (Running on oeis4.)