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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
1
164, 2304, 32800, 470736, 6762544, 97195728, 1397061008, 20081495760, 288654902864, 4149183188048, 59641208080720, 857295028870096, 12322935895207376, 177132428329388368, 2546138151034718032
OFFSET
1,1
COMMENTS
Column 3 of A209897
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 14 2012
STATUS
approved