A232334 Number of nX7 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally, with no adjacent elements equal

26, 388, 5530, 82526, 1274656, 20052758, 318521414, 5084744564, 81376107850, 1303994749578, 20908870281768, 335369094519602, 5380024352555430, 86313698646851076, 1384816751017368294, 22218432354426792578

Offset

1,1

Comments

Column 7 of A232335

Links

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

Formula

Empirical: a(n) = 25*a(n-1) -144*a(n-2) -39*a(n-3) +579*a(n-4) +2066*a(n-5) +138*a(n-6) -5848*a(n-7) -13546*a(n-8) -13582*a(n-9) -7801*a(n-10) -927*a(n-11) +968*a(n-12) +737*a(n-13) +11*a(n-14) +8*a(n-15) -20*a(n-16) for n>18

Example

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

Crossrefs

Sequence in context: A159882 A036402 A036401 * A020924 A022750 A125483

Adjacent sequences: A232331 A232332 A232333 * A232335 A232336 A232337

Keyword

nonn

Author

R. H. Hardin, Nov 22 2013

Status

approved