A274956 Number of nX5 0..2 arrays with no element equal to any value at offset (-1,-1) (-2,0) or (0,-2) and new values introduced in order 0..2.

12, 216, 1638, 14406, 126540, 1119744, 9902040, 87416934, 772181640, 6822635046, 60278247414, 532537958400, 4704850866576, 41566565400576, 367232957703060, 3244431938093664, 28663935576914748, 253240434847277664

Offset

1,1

Comments

Column 5 of A274959.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 9*a(n-1) -14*a(n-3) +126*a(n-4) -1046*a(n-5) -596*a(n-6) +6988*a(n-7) -890*a(n-8) -10542*a(n-9) +7876*a(n-10) -14656*a(n-11) -2216*a(n-12) +23008*a(n-13) -19912*a(n-14) +17376*a(n-15) -4912*a(n-16) -8912*a(n-17) +7632*a(n-18) -3520*a(n-19) +704*a(n-20) +1568*a(n-21) -1120*a(n-22) +160*a(n-24) -32*a(n-25) for n>28

Example

Some solutions for n=4
..0..1..1..0..0. .0..1..2..0..1. .0..0..1..1..0. .0..0..1..1..2
..1..1..2..2..1. .2..2..0..0..1. .2..1..1..0..2. .0..1..1..0..2
..1..2..0..1..1. .2..0..0..2..2. .1..1..2..0..1. .2..1..0..0..1
..0..2..1..1..0. .0..0..1..2..0. .1..0..2..1..1. .1..0..2..2..1

Crossrefs

Cf. A274959.

Sequence in context: A027487 A276245 A241225 * A116164 A268369 A091266

Adjacent sequences: A274953 A274954 A274955 * A274957 A274958 A274959

Keyword

nonn

Author

R. H. Hardin, Jul 12 2016

Status

approved