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 A263387 Number of (n+1)X(3+1) arrays of permutations of 0..n*3-1 with each element moved a city block distance of exactly 2. 1
 16, 1600, 70225, 2205225, 85599504, 3623076864, 146943422224, 5787820712521, 230179176125649, 9243027274360896, 370481900615995536, 14801700800476792449, 591533534101543481889, 23664671468723798926336 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A263389. LINKS R. H. Hardin, Table of n, a(n) for n = 1..145 EXAMPLE Some solutions for n=3 ..8..3..7..6....5..4..7..6....8..3.10.11....2..9..7..6....2..6..5.11 ..1.10..9..2...12.13..9.15....1.13.14..2....1.10.11..5....9..8..4.10 ..0.11.15.14....0..1..2..3....0..6..5..9....0..4..8..3....0..1.13..3 ..4..5.12.13...14..8.11.10....4.15.12..7...14.15.12.13...14.15.12..7 CROSSREFS Cf. A263389. Sequence in context: A321247 A145406 A307924 * A264199 A160306 A167000 Adjacent sequences:  A263384 A263385 A263386 * A263388 A263389 A263390 KEYWORD nonn AUTHOR R. H. Hardin, Oct 16 2015 STATUS approved

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Last modified July 23 12:19 EDT 2021. Contains 346259 sequences. (Running on oeis4.)