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 A252809 Number of (n+2) X (6+2) 0..4 arrays with every consecutive three elements in every row and column not having exactly two distinct values, and in every diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order. 1
 4045, 2301, 6961, 2795, 9869, 30949, 13010, 45797, 138103, 59021, 201153, 603059, 265491, 900991, 2696670, 1205865, 4066070, 12121386, 5482742, 18338088, 54449714, 24937056, 82737170, 244696567, 113512416, 373529183, 1100179669 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 6 of A252811. LINKS R. H. Hardin, Table of n, a(n) for n = 1..180 FORMULA Empirical: a(n) = a(n-1) +10*a(n-3) -10*a(n-4) -27*a(n-6) +27*a(n-7) +6*a(n-9) -6*a(n-10) +6*a(n-12) -6*a(n-13) +53*a(n-15) -53*a(n-16) +29*a(n-18) -29*a(n-19) -29*a(n-21) +29*a(n-22) -79*a(n-24) +79*a(n-25) -62*a(n-27) +62*a(n-28) -12*a(n-30) +12*a(n-31) +5*a(n-33) -5*a(n-34) +4*a(n-36) -4*a(n-37) +a(n-39) -a(n-40) for n > 46. EXAMPLE Some solutions for n=2 ..0..1..2..3..4..2..1..4....0..1..2..0..3..2..4..3....0..1..2..3..1..2..4..1 ..4..0..2..4..3..2..4..3....2..2..2..2..2..2..2..2....1..1..1..1..1..1..1..1 ..2..2..2..2..2..2..2..2....3..0..2..1..4..2..3..4....2..1..0..2..1..3..2..1 ..0..4..2..0..4..2..3..1....0..3..2..4..1..2..0..3....0..1..2..0..1..2..3..1 CROSSREFS Cf. A252811. Sequence in context: A332458 A204948 A237030 * A202313 A001382 A090058 Adjacent sequences: A252806 A252807 A252808 * A252810 A252811 A252812 KEYWORD nonn AUTHOR R. H. Hardin, Dec 22 2014 STATUS approved

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Last modified August 6 13:43 EDT 2024. Contains 374974 sequences. (Running on oeis4.)