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 A209520 Number of n X n 0..7 arrays with every 2X2 subblock containing exactly one value repeat, and new values 0..7 introduced in row major order 0
 1, 6, 2027, 27323948, 16484968944748, 258381047085271692456 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A209527 LINKS Table of n, a(n) for n=1..6. EXAMPLE Some solutions for n=5 ..0..0..0..0..0....0..0..0..0..0....0..0..0..1..0....0..0..0..0..1 ..1..2..1..2..1....1..2..1..2..3....1..2..3..0..2....1..2..1..3..3 ..2..3..2..0..0....1..3..3..1..2....0..0..2..0..1....2..0..0..0..1 ..1..1..1..1..2....4..4..5..1..4....4..1..0..1..2....1..1..2..1..2 ..0..2..0..2..0....5..6..6..5..1....1..2..0..2..0....0..2..0..0..0 CROSSREFS Sequence in context: A053293 A209737 A209458 * A279440 A004817 A089535 Adjacent sequences: A209517 A209518 A209519 * A209521 A209522 A209523 KEYWORD nonn AUTHOR R. H. Hardin Mar 10 2012 STATUS approved

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Last modified August 6 16:57 EDT 2024. Contains 374980 sequences. (Running on oeis4.)