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A251499 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock summing to 4 5 6 7 or 8 8
186, 2270, 2270, 27844, 86946, 27844, 341718, 3361296, 3361296, 341718, 4194002, 130169514, 411510096, 130169514, 4194002, 51474508, 5042543734, 50511532876, 50511532876, 5042543734, 51474508, 631765770, 195351371872, 6203258853660 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
.....186.......2270.........27844...........341718.............4194002
....2270......86946.......3361296........130169514..........5042543734
...27844....3361296.....411510096......50511532876.......6203258853660
..341718..130169514...50511532876...19669407965330....7664671702820686
.4194002.5042543734.6203258853660.7664671702820686.9478728485533475524
LINKS
FORMULA
Empirical for column k:
k=1: a(n) = 13*a(n-1) -5*a(n-2) -52*a(n-3) +48*a(n-4)
k=2: [order 12]
k=3: [order 52]
EXAMPLE
Some solutions for n=2 k=4
..0..0..2..2..3....0..0..2..2..0....0..0..2..0..3....0..0..0..2..1
..2..2..0..1..2....2..2..0..3..0....2..2..2..3..1....2..2..2..0..1
..0..3..3..1..0....1..3..2..0..2....1..2..1..0..0....3..0..2..0..3
CROSSREFS
Sequence in context: A234108 A200199 A364859 * A251492 A289301 A147817
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Dec 03 2014
STATUS
approved

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Last modified February 24 22:04 EST 2024. Contains 370307 sequences. (Running on oeis4.)