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 A278797 Number of nX6 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes. 1
 2128, 4888659, 7804657491, 11262497170744, 14688350983557860, 17132175867394310218, 17905720402390042972393, 16929268110709399178933670, 14654548270532478576848465454, 11752173813052078583219415650082 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 6 of A278798. LINKS R. H. Hardin, Table of n, a(n) for n = 1..18 EXAMPLE Some solutions for n=1 ..3..1..3..3..0..1. .3..0..0..3..0..1. .0..1..1..0..3..0. .0..3..0..2..2..2 CROSSREFS Cf. A278798. Sequence in context: A321117 A337644 A278552 * A251134 A338070 A210271 Adjacent sequences:  A278794 A278795 A278796 * A278798 A278799 A278800 KEYWORD nonn AUTHOR R. H. Hardin, Nov 28 2016 STATUS approved

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Last modified January 18 12:07 EST 2021. Contains 340254 sequences. (Running on oeis4.)