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A237945 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum minus the minimum of every 2X2 subblock equal 9
81, 437, 437, 2417, 5519, 2417, 13893, 70435, 70435, 13893, 81245, 946063, 2020033, 946063, 81245, 482409, 12909207, 61286941, 61286941, 12909207, 482409, 2893685, 178348911, 1871339377, 4202495253, 1871339377, 178348911, 2893685, 17487137 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
.......81.........437...........2417.............13893.................81245
......437........5519..........70435............946063..............12909207
.....2417.......70435........2020033..........61286941............1871339377
....13893......946063.......61286941........4202495253..........287601819479
....81245....12909207.....1871339377......287601819479........43830625875881
...482409...178348911....57597474709....19789034062007......6710777181199757
..2893685..2478121687..1776214151413..1361783640641509...1026737324539406021
.17487137.34547541807.54843034007201.93760075445980377.157146320305650540261
LINKS
FORMULA
Empirical for column k:
k=1: a(n) = 8*a(n-1) -a(n-2) -64*a(n-3) -14*a(n-4) +88*a(n-5) +8*a(n-6) -24*a(n-7)
k=2: [order 12]
k=3: [order 23]
k=4: [order 54]
EXAMPLE
Some solutions for n=2 k=4
..0..0..1..0..1....0..0..2..1..0....0..0..2..1..2....0..0..0..1..2
..0..2..1..2..0....2..0..0..2..1....0..2..2..0..0....2..0..2..0..2
..2..1..0..2..0....0..0..2..0..0....1..2..0..2..2....0..0..1..0..1
CROSSREFS
Sequence in context: A237385 A237308 A237301 * A237938 A017630 A270538
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Feb 16 2014
STATUS
approved

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)