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 A201700 T(n,k)=Number of nXk 0..2 arrays with rows and columns lexicographically nondecreasing read forwards and nonincreasing read backwards 7
 3, 3, 3, 3, 10, 3, 3, 18, 18, 3, 3, 27, 116, 27, 3, 3, 37, 395, 395, 37, 3, 3, 48, 989, 4998, 989, 48, 3, 3, 60, 2068, 35390, 35390, 2068, 60, 3, 3, 73, 3838, 167625, 930564, 167625, 3838, 73, 3, 3, 87, 6541, 607919, 14268351, 14268351, 607919, 6541, 87, 3, 3, 102 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts .3...3.....3........3...........3..............3...............3 .3..10....18.......27..........37.............48..............60 .3..18...116......395.........989...........2068............3838 .3..27...395.....4998.......35390.........167625..........607919 .3..37...989....35390......930564.......14268351.......142436489 .3..48..2068...167625....14268351......795339012.....27102769900 .3..60..3838...607919...142436489....27102769900...3262897246338 .3..73..6541..1826778..1034563890...615440785548.253484699853930 .3..87.10455..4775228..5898023820.10106227864338 .3.102.15894.11211034.27803725006 LINKS R. H. Hardin, Table of n, a(n) for n = 1..112 EXAMPLE Some solutions for n=5 k=3 ..0..0..2....0..0..2....0..2..2....0..1..2....0..1..2....0..2..2....0..1..2 ..0..2..1....0..0..2....0..2..2....1..0..2....1..0..1....0..2..2....0..2..0 ..2..0..1....0..1..0....2..1..2....1..0..2....1..0..1....1..0..2....0..2..0 ..2..0..1....1..0..0....2..1..2....1..0..2....1..0..1....1..1..0....1..1..0 ..2..2..0....1..0..0....2..2..1....2..2..1....1..1..0....2..0..0....2..0..0 CROSSREFS Column 2 is A051938(n+5) Sequence in context: A161836 A087576 A337328 * A087575 A001270 A029630 Adjacent sequences:  A201697 A201698 A201699 * A201701 A201702 A201703 KEYWORD nonn,tabl AUTHOR R. H. Hardin Dec 03 2011 STATUS approved

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Last modified January 21 22:45 EST 2021. Contains 340359 sequences. (Running on oeis4.)