A209892 Number of (n+1)X4 0..2 arrays with every 2X2 subblock having two distinct values, and new values 0..2 introduced in row major order

164, 2304, 32800, 470736, 6762544, 97195728, 1397061008, 20081495760, 288654902864, 4149183188048, 59641208080720, 857295028870096, 12322935895207376, 177132428329388368, 2546138151034718032

Offset

1,1

Comments

Column 3 of A209897

Links

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

Formula

Empirical: a(n) = 14*a(n-1) +31*a(n-2) -366*a(n-3) -210*a(n-4) +2564*a(n-5) +40*a(n-6) -4096*a(n-7) -96*a(n-8) +1152*a(n-9)

Example

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

Crossrefs

Sequence in context: A250928 A205314 A229377 * A264241 A229369 A229388

Adjacent sequences: A209889 A209890 A209891 * A209893 A209894 A209895

Keyword

nonn

Author

R. H. Hardin Mar 14 2012

Status

approved