A280856 Number of nX5 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.

30, 442, 256, 216, 282, 491, 968, 1857, 3220, 5281, 8574, 14339, 24694, 42833, 73650, 125361, 212438, 360727, 614668, 1049609, 1791800, 3055487, 5205640, 8868669, 15113516, 25765385, 43926544, 74885231, 127643494, 217567203, 370837946

Offset

1,1

Comments

Column 5 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) +2*a(n-4) -a(n-5) +4*a(n-6) -a(n-7) -a(n-8) -2*a(n-9) -3*a(n-12) for n>18

Example

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

Crossrefs

Cf. A280859.

Sequence in context: A125465 A215193 A163130 * A281602 A307917 A006421

Adjacent sequences: A280853 A280854 A280855 * A280857 A280858 A280859

Keyword

nonn

Author

R. H. Hardin, Jan 09 2017

Status

approved