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A280858 Number of nX7 0..2 arrays with no element equal to more than one of its king-move neighbors and with new values introduced in order 0 sequentially upwards. 1
224, 6596, 1698, 1005, 968, 1202, 1738, 2877, 5244, 9569, 15872, 24653, 36954, 55077, 83190, 128817, 204084, 326793, 522262, 828099, 1300592, 2029441, 3159306, 4927841, 7712840, 12114811, 19061740, 29999825, 47157384, 74031085, 116080358 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A280859.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +a(n-2) -a(n-3) +a(n-4) -a(n-5) +2*a(n-6) -a(n-7) +6*a(n-8) -4*a(n-9) -4*a(n-12) -a(n-13) -2*a(n-14) -3*a(n-15) -3*a(n-16) +3*a(n-17) -3*a(n-18) +a(n-19) -a(n-20) +2*a(n-23) for n>29

EXAMPLE

Some solutions for n=4

..0..0..1..1..2..1..2. .0..1..0..0..1..0..0. .0..1..1..2..1..2..2

..1..2..2..0..0..1..0. .2..2..1..2..1..2..1. .2..2..0..2..0..0..1

..1..0..1..1..2..2..0. .1..0..0..2..0..2..0. .0..1..0..1..1..2..1

..2..0..2..0..0..1..1. .1..2..1..1..0..1..0. .0..1..2..2..0..2..0

CROSSREFS

Cf. A280859.

Sequence in context: A232804 A032802 A224431 * A281604 A007771 A229459

Adjacent sequences:  A280855 A280856 A280857 * A280859 A280860 A280861

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 09 2017

STATUS

approved

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Last modified January 27 18:40 EST 2022. Contains 350611 sequences. (Running on oeis4.)