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 A268051 Number of n X n 0..2 arrays with new values introduced in each row and column in sequential order starting with zero. 1
 1, 2, 18, 1082, 560778, 2666449962, 116124404018058, 45944873892068760842, 164311405786753523443114218, 5298327789094557001583255058644522, 1538780360110790603716817054271433490324298 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A268056. LINKS R. H. Hardin, Table of n, a(n) for n = 1..19 EXAMPLE Some solutions for n=4 ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0 ..0..1..0..1....0..0..0..0....0..1..1..0....0..0..1..1....0..1..1..0 ..0..0..1..0....0..1..1..0....0..1..1..0....0..0..1..1....0..1..2..0 ..0..1..0..2....0..0..0..0....0..1..0..1....0..0..1..2....0..1..1..0 CROSSREFS Cf. A268056. Sequence in context: A180606 A334553 A013040 * A268074 A202544 A203421 Adjacent sequences: A268048 A268049 A268050 * A268052 A268053 A268054 KEYWORD nonn AUTHOR R. H. Hardin, Jan 25 2016 STATUS approved

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Last modified May 31 17:17 EDT 2023. Contains 363068 sequences. (Running on oeis4.)