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, 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

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

Table of n, a(n) for n=1..32.

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

Adjacent sequences: A262106 A262107 A262108 * A262110 A262111 A262112

Keyword

nonn,tabl

Author

R. H. Hardin, Sep 11 2015

Status

approved