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 A230933 Number of black-square subarrays of (n+2)X(6+2) 0..3 arrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero 2
 42, 438, 3768, 37984, 396950, 4092246, 41991510, 431437274, 4435310118, 45590703272, 468598417126, 4816515719528, 49507271980530, 508867096276696, 5230454214732138, 53761897206996568, 552598679075230458 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 6 of A230935 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 R. H. Hardin, Empirical recurrence of order 71 FORMULA Empirical recurrence of order 71 (see link above) EXAMPLE Some solutions for n=4 ..x..0..x..0..x..1..x..3....x..0..x..2..x..2..x..0....x..0..x..2..x..0..x..0 ..3..x..1..x..2..x..0..x....1..x..3..x..3..x..1..x....3..x..1..x..3..x..1..x ..x..2..x..0..x..3..x..1....x..2..x..0..x..0..x..0....x..2..x..0..x..2..x..0 ..1..x..3..x..1..x..2..x....1..x..3..x..1..x..3..x....1..x..1..x..1..x..3..x ..x..0..x..2..x..0..x..1....x..2..x..2..x..0..x..2....x..0..x..0..x..0..x..2 ..3..x..3..x..3..x..3..x....1..x..1..x..3..x..3..x....3..x..3..x..3..x..3..x CROSSREFS Sequence in context: A251425 A242144 A242145 * A231110 A156762 A248094 Adjacent sequences: A230930 A230931 A230932 * A230934 A230935 A230936 KEYWORD nonn AUTHOR R. H. Hardin, Nov 01 2013 STATUS approved

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Last modified December 5 13:26 EST 2022. Contains 358586 sequences. (Running on oeis4.)