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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. 1
30, 1917, 119440, 7533245, 474736149, 29920114246, 1885698283255, 118845116023725, 7490149091439288, 472062591963218273, 29751489321018113345, 1875071509361980884750, 118175366862571989996619 (list; graph; refs; listen; history; text; internal format)
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: A042740 A282126 A112003 * A092608 A241128 A255958

Adjacent sequences:  A280667 A280668 A280669 * A280671 A280672 A280673

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 07 2017

STATUS

approved

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Last modified November 13 15:41 EST 2019. Contains 329106 sequences. (Running on oeis4.)