A280671 Number of nX6 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.

82, 10893, 1401470, 183331502, 23952262535, 3130289979912, 409089889172506, 53463025958093933, 6986960714513387194, 913109939977637081743, 119332252787740585439815, 15595259598595853987150831

Offset

1,1

Comments

Column 6 of A280673.

Links

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

Formula

Empirical: a(n) = 115*a(n-1) +2093*a(n-2) -4155*a(n-3) -183686*a(n-4) -585648*a(n-5) +633260*a(n-6) +10692868*a(n-7) -4449787*a(n-8) -90326895*a(n-9) -58218792*a(n-10) -85358831*a(n-11) -153604102*a(n-12) +506925527*a(n-13) +114376456*a(n-14) +783370521*a(n-15) +27819835*a(n-16) +40476932*a(n-17) -4134454*a(n-18) +1119384*a(n-19) -261121*a(n-20) for n>22

Example

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

Crossrefs

Cf. A280673.

Sequence in context: A054214 A093241 A280361 * A241129 A289330 A282157

Adjacent sequences: A280668 A280669 A280670 * A280672 A280673 A280674

Keyword

nonn

Author

R. H. Hardin, Jan 07 2017

Status

approved