A183439 Number of nX6 binary arrays with every 1 having exactly one king-move neighbor equal to 1

9, 149, 751, 6392, 56472, 413450, 3352423, 27025949, 212040472, 1694099411, 13495015207, 107114515475, 852810786694, 6784375565061, 53949128904820, 429213532471317, 3414173807924736, 27156955992465880, 216027779239218668

Offset

1,1

Comments

Column 6 of A183442

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Formula

Empirical: a(n)=2*a(n-1)+16*a(n-2)+246*a(n-3)+193*a(n-4)+69*a(n-5)-10142*a(n-6)-8580*a(n-7)-7271*a(n-8)+154606*a(n-9)+125269*a(n-10)+77020*a(n-11)-1099014*a(n-12)-575139*a(n-13)-686483*a(n-14)+3661102*a(n-15)+1412727*a(n-16)+1937644*a(n-17)-6165206*a(n-18)-1730990*a(n-19)-2263587*a(n-20)+6096896*a(n-21)+704037*a(n-22)+786533*a(n-23)-3410935*a(n-24)-236810*a(n-25)+343555*a(n-26)+679458*a(n-27)+28058*a(n-28)-75003*a(n-29)-46332*a(n-30)

Example

Some solutions for 3X6
..0..0..0..0..1..1....0..0..0..0..1..0....0..1..1..0..0..1....0..0..0..0..1..0
..0..0..0..0..0..0....0..0..0..1..0..0....0..0..0..0..0..1....0..0..1..0..0..1
..1..1..0..0..1..1....1..1..0..0..0..0....1..1..0..0..0..0....0..0..1..0..0..0

Crossrefs

Sequence in context: A361066 A050580 A266128 * A296017 A218350 A337672

Adjacent sequences: A183436 A183437 A183438 * A183440 A183441 A183442

Keyword

nonn

Author

R. H. Hardin Jan 04 2011

Status

approved