A233215 Number of n X 6 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order.

452, 3054973, 23644611625, 183912498314536, 1430752433413485334, 11130643973331790638169, 86591682356567376541898371, 673646513468251754412792158962, 5240683780080621074089550798301976

Offset

1,1

Comments

Column 6 of A233217.

Links

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

Formula

Empirical: a(n) = 8117*a(n-1) -2645074*a(n-2) +156363286*a(n-3) -2788528505*a(n-4) +19055308405*a(n-5) -46305234612*a(n-6) +29884728384*a(n-7).

Example

Some solutions for n=2
..0..0..1..2..2..2....0..0..1..2..4..0....0..0..1..0..2..0....0..0..1..0..2..0
..0..1..2..2..2..2....0..0..4..3..3..4....0..0..2..4..2..0....3..1..1..1..3..0

Crossrefs

Cf. A233217.

Sequence in context: A233145 A233237 A233111 * A081739 A245946 A076547

Adjacent sequences: A233212 A233213 A233214 * A233216 A233217 A233218

Keyword

nonn

Author

R. H. Hardin, Dec 06 2013

Status

approved