A280670 Number of nX5 0..2 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.

30, 1917, 119440, 7533245, 474736149, 29920114246, 1885698283255, 118845116023725, 7490149091439288, 472062591963218273, 29751489321018113345, 1875071509361980884750, 118175366862571989996619

Offset

1,1

Comments

Column 5 of A280673.

Links

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

Formula

Empirical: a(n) = 59*a(n-1) +268*a(n-2) -869*a(n-3) -2331*a(n-4) +3754*a(n-5) -8240*a(n-6) -88*a(n-7) -3472*a(n-8) for n>9

Example

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

Crossrefs

Cf. A280673.

Sequence in context: A367392 A282126 A112003 * A092608 A241128 A330598

Adjacent sequences: A280667 A280668 A280669 * A280671 A280672 A280673

Keyword

nonn

Author

R. H. Hardin, Jan 07 2017

Status

approved