A205623 Number of (n+1)X6 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

3074, 43248, 708300, 11438856, 188139156, 3042034560, 50032728864, 809272164864, 13306390815072, 215291512025088, 3538911397147392, 57273957730844160, 941198542228997376, 15236505936023298048

Offset

1,1

Comments

Column 5 of A205626

Links

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

Formula

Empirical: a(n) = 264*a(n-2) +80*a(n-3) -648*a(n-4) -1536*a(n-5) -8384*a(n-6) -65536*a(n-8) for n>9

Example

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

Crossrefs

Sequence in context: A251786 A334256 A262459 * A205358 A045083 A186470

Adjacent sequences: A205620 A205621 A205622 * A205624 A205625 A205626

Keyword

nonn

Author

R. H. Hardin Jan 29 2012

Status

approved