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A252397 T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 4 6
2205, 21544, 21544, 224346, 437023, 224346, 2302050, 9807871, 9807871, 2302050, 23364738, 203636149, 454970982, 203636149, 23364738, 237415904, 4246242886, 19516646285, 19516646285, 4246242886, 237415904, 2418956843, 89843675557 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
......2205.......21544.........224346...........2302050............23364738
.....21544......437023........9807871.........203636149..........4246242886
....224346.....9807871......454970982.......19516646285........851022689884
...2302050...203636149....19516646285.....1721897188968.....153561179184793
..23364738..4246242886...851022689884...153561179184793...28203141901710764
.237415904.89843675557.37408598546844.13852142421855853.5252935058161288682
LINKS
FORMULA
Empirical for column k:
k=1: [linear recurrence of order 39] for n>45
EXAMPLE
Some solutions for n=1 k=4
..0..0..1..0..1..0....0..0..1..1..0..2....0..0..1..0..2..1....0..0..1..1..0..0
..0..1..1..1..1..1....0..0..0..1..0..1....0..0..0..1..0..0....0..1..1..0..0..0
..0..1..1..1..0..1....0..1..0..0..0..0....0..2..0..0..1..1....0..0..1..0..0..2
CROSSREFS
Sequence in context: A233444 A125015 A348743 * A252392 A175915 A098192
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Dec 17 2014
STATUS
approved

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Last modified June 5 05:23 EDT 2023. Contains 363130 sequences. (Running on oeis4.)