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A250601 T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with nondecreasing sum of every three consecutive values in every row and column 9
19683, 157464, 157464, 1259712, 2099520, 1259712, 10077696, 27993600, 27993600, 10077696, 46656000, 373248000, 622080000, 373248000, 46656000, 216000000, 2592000000, 13824000000, 13824000000, 2592000000, 216000000, 1000000000 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
......19683.......157464.........1259712..........10077696............46656000
.....157464......2099520........27993600.........373248000..........2592000000
....1259712.....27993600.......622080000.......13824000000........144000000000
...10077696....373248000.....13824000000......512000000000.......8000000000000
...46656000...2592000000....144000000000.....8000000000000.....175000000000000
..216000000..18000000000...1500000000000...125000000000000....3828125000000000
.1000000000.125000000000..15625000000000..1953125000000000...83740234375000000
.3375000000.590625000000.103359375000000.18087890625000000.1034024414062500000
LINKS
FORMULA
Empirical for column k:
k=1: [linear recurrence of order 53; also a polynomial of degree 18 plus a quasipolynomial of degree 16 with period 3]
EXAMPLE
Some solutions for n=1 k=4
..0..0..0..0..0..0....0..0..0..0..0..1....0..0..0..0..0..1....0..0..0..0..0..1
..1..1..0..1..2..2....0..0..0..2..1..2....1..1..0..2..1..1....0..1..2..1..1..2
..0..1..0..2..2..2....1..0..1..1..2..2....1..0..1..2..2..2....2..1..0..2..2..2
CROSSREFS
Sequence in context: A046322 A224658 A224654 * A373476 A250594 A067489
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Nov 25 2014
STATUS
approved

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Last modified June 24 19:44 EDT 2024. Contains 373690 sequences. (Running on oeis4.)