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A262109 T(n,k) = Number of (n+1) X (k+1) 0..2 arrays with each row nonprime and column prime, read as a base 3 number with top and left being the most significant digits. 7
7, 26, 17, 130, 195, 54, 617, 2426, 1968, 171, 2668, 27414, 61256, 18933, 554, 11479, 286164, 1845169, 1518344, 186780, 1926, 47947, 2924668, 50756609, 118115088, 38154616, 2019171, 6976, 201431, 27440631, 1290246169, 8260429504 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
....7......26......130.......617.......2668......11479....47947.201431
...17.....195.....2426.....27414.....286164....2924668.27440631
...54....1968....61256...1845169...50756609.1290246169
..171...18933..1518344.118115088.8260429504
..554..186780.38154616
.1926.2019171
.6976
LINKS
EXAMPLE
Some solutions for n=3, k=4
..0..2..0..2..0....0..0..0..2..2....0..0..0..2..2....0..0..2..1..1
..0..2..0..1..0....0..0..0..0..1....0..1..0..1..2....0..0..1..1..2
..1..0..1..1..2....2..0..0..1..1....1..1..1..2..2....2..0..2..1..2
..0..1..2..1..1....1..2..2..2..1....0..1..0..2..1....1..2..2..2..2
CROSSREFS
Sequence in context: A063453 A284054 A284786 * A276614 A230399 A246910
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Sep 11 2015
STATUS
approved

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Last modified July 15 14:56 EDT 2024. Contains 374333 sequences. (Running on oeis4.)