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 A230939 Number of white-square subarrays of (n+2)X(7+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 1
 42, 1312, 8450, 208172, 1604098, 41991510, 318984080, 8279222070, 62983913970, 1636647076866, 12449868229094, 323476245049122, 2460739904000374, 63937066423053164, 486382045071603570, 12637596474609429472 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 7 of A230940 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=4 ..0..x..2..x..2..x..0..x..2....0..x..0..x..0..x..2..x..2 ..x..1..x..3..x..1..x..3..x....x..1..x..3..x..1..x..3..x ..0..x..0..x..2..x..2..x..2....0..x..2..x..0..x..0..x..2 ..x..3..x..1..x..3..x..0..x....x..3..x..1..x..1..x..3..x ..2..x..0..x..0..x..1..x..3....0..x..2..x..2..x..0..x..2 ..x..1..x..3..x..3..x..2..x....x..1..x..1..x..3..x..3..x CROSSREFS Sequence in context: A001778 A111780 A075922 * A331858 A331805 A348775 Adjacent sequences: A230936 A230937 A230938 * A230940 A230941 A230942 KEYWORD nonn AUTHOR R. H. Hardin, Nov 01 2013 STATUS approved

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Last modified May 30 14:34 EDT 2024. Contains 372968 sequences. (Running on oeis4.)