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 A233683 Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 10, and no two adjacent values equal 0
 32, 548, 19248, 1723204, 350631128, 180309108120, 213645503481064, 637071561523768628, 4389462721204153964920, 76077651482837452211667424, 3050446568436589473373323664384, 307742402424024480499984248922221296 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A233691 LINKS Table of n, a(n) for n=1..12. EXAMPLE Some solutions for n=3 ..1..3..2..3....0..2..3..2....0..2..0..2....0..1..0..1....1..3..2..0 ..0..1..0..1....2..3..1..3....1..0..1..3....2..0..2..3....2..1..0..1 ..1..3..2..0....3..1..2..1....3..1..3..2....3..1..0..2....1..3..2..3 ..0..1..3..1....2..3..1..3....2..0..2..0....2..0..2..1....2..1..0..1 CROSSREFS Sequence in context: A154306 A004417 A283688 * A093751 A178372 A082557 Adjacent sequences: A233680 A233681 A233682 * A233684 A233685 A233686 KEYWORD nonn AUTHOR R. H. Hardin, Dec 14 2013 STATUS approved

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Last modified September 26 04:29 EDT 2023. Contains 365653 sequences. (Running on oeis4.)