A208372 Number of 6Xn 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 0 1 0 vertically

21, 441, 3633, 41433, 422541, 4503765, 47178453, 497691495, 5235328875, 55135304931, 580377874461, 6110484281013, 64328902346583, 677252632373457, 7129999455655041, 75063819603876579, 790261545306328809

Offset

1,1

Comments

Row 6 of A208369

Links

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

Formula

Empirical: a(n) = 86*a(n-2) +334*a(n-3) -459*a(n-4) -3348*a(n-5) +249*a(n-6) +13148*a(n-7) +1379*a(n-8) -25508*a(n-9) +377*a(n-10) +23840*a(n-11) -4337*a(n-12) -8632*a(n-13) +1927*a(n-14) +1170*a(n-15) -195*a(n-16) -50*a(n-17)

Example

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

Crossrefs

Sequence in context: A207440 A188691 A207430 * A206874 A188504 A206880

Adjacent sequences: A208369 A208370 A208371 * A208373 A208374 A208375

Keyword

nonn

Author

R. H. Hardin Feb 25 2012

Status

approved