A205622 Number of (n+1)X5 0..2 arrays with every 2X2 subblock in a row having an equal number of equal diagonal or equal antidiagonal elements, adjacent rows differing in this number, and new values 0..2 introduced in row major order

770, 8004, 94116, 1103436, 13072068, 153531936, 1819019544, 21373648800, 253152022176, 2975505412608, 35231638122048, 414226627999488, 4903309297903872, 57664764519684096, 682417731549562368

Offset

1,1

Comments

Column 4 of A205626

Links

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

Formula

Empirical: a(n) = 136*a(n-2) +64*a(n-3) -264*a(n-4) -384*a(n-5) -1920*a(n-6) -7168*a(n-8) for n>9

Example

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

Crossrefs

Sequence in context: A216646 A252077 A236784 * A205357 A252551 A045078

Adjacent sequences: A205619 A205620 A205621 * A205623 A205624 A205625

Keyword

nonn

Author

R. H. Hardin Jan 29 2012

Status

approved