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A251283 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock having its maximum diagonal element less than its minimum antidiagonal element 9
230, 3264, 3264, 46244, 164800, 46244, 655040, 8320896, 8320896, 655040, 9278296, 420152704, 1497752279, 420152704, 9278296, 131421696, 21215177472, 269564757184, 269564757184, 21215177472, 131421696, 1861511440 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
.....230........3264..........46244.............655040...............9278296
....3264......164800........8320896..........420152704...........21215177472
...46244.....8320896.....1497752279.......269564757184........48514315795424
..655040...420152704...269564757184....172919373209920....110920574724652544
.9278296.21215177472.48514315795424.110920574724652544.253597772369472323328
LINKS
FORMULA
Empirical for column k:
k=1: a(n) = 16*a(n-1) -26*a(n-2)
k=2: a(n) = 54*a(n-1) -182*a(n-2) +228*a(n-3) +1152*a(n-4)
k=3: [order 9]
k=4: [order 23]
EXAMPLE
Some solutions for n=2 k=4
..0..0..2..1..0....0..0..0..1..1....0..0..1..0..3....0..0..3..1..2
..0..0..0..2..1....0..3..0..1..2....0..0..0..2..2....0..0..0..0..2
..0..0..1..2..3....0..0..1..3..3....0..0..0..0..3....0..0..1..1..1
CROSSREFS
Sequence in context: A211711 A211716 A251445 * A251276 A194490 A232379
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Dec 01 2014
STATUS
approved

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Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)