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 A204230 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards 9
 81, 450, 450, 2500, 4539, 2500, 11100, 44641, 44641, 11100, 49284, 312001, 752562, 312001, 49284, 192474, 2173565, 8183170, 8183170, 2173565, 192474, 751689, 12097076, 87487117, 129062037, 87487117, 12097076, 751689, 2707641, 67329896 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ......81.......450........2500.........11100...........49284...........192474 .....450......4539.......44641........312001.........2173565.........12097076 ....2500.....44641......752562.......8183170........87487117........694547816 ...11100....312001.....8183170.....129062037......2019310610......21958547501 ...49284...2173565....87487117....2019310610.....45791699846.....687853333430 ..192474..12097076...694547816...21958547501....687853333430...13629970952083 ..751689..67329896..5466340007..239090847020..10297878073062..271354063234561 .2707641.320850651.34834605810.1998393334223.113754005579615.3835838251329000 LINKS R. H. Hardin, Table of n, a(n) for n = 1..111 EXAMPLE Some solutions for n=4 k=3 ..2..2..1..2....0..2..2..0....0..2..2..2....0..0..2..0....2..1..0..2 ..1..2..2..2....1..0..1..2....1..2..0..2....0..0..0..1....0..0..2..0 ..2..2..1..2....0..2..2..0....0..2..2..2....1..0..2..1....1..2..0..2 ..1..2..2..2....2..0..1..2....1..2..1..2....0..2..2..2....1..2..2..2 ..2..2..1..2....0..2..2..1....1..2..2..2....0..1..2..1....2..2..1..2 CROSSREFS Sequence in context: A236705 A253749 A253375 * A235441 A235406 A253742 Adjacent sequences: A204227 A204228 A204229 * A204231 A204232 A204233 KEYWORD nonn,tabl AUTHOR R. H. Hardin Jan 13 2012 STATUS approved

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Last modified October 2 05:37 EDT 2023. Contains 365831 sequences. (Running on oeis4.)