

A274801


Number of nX6 0..2 arrays with no element equal to any value at offset (1,2) (2,1) (0,1) or (1,0) and new values introduced in order 0..2.


1



16, 164, 1572, 16328, 169328, 1774372, 18476064, 193292660, 2016460140, 21072173792, 219985654388, 2297904486000, 23995177354892, 250610794543168, 2617142836973944, 27332712382107996, 285444819027741180
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OFFSET

1,1


COMMENTS

Column 6 of A274803.


LINKS

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


FORMULA

Empirical: a(n) = 2*a(n1) +80*a(n2) +140*a(n3) 474*a(n4) 998*a(n5) 130*a(n6) +781*a(n7) +814*a(n8) 79*a(n9) 360*a(n10) +54*a(n11) +48*a(n12) 52*a(n13) +4*a(n14) for n>15


EXAMPLE

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


CROSSREFS

Cf. A274803.
Sequence in context: A275231 A138407 A094857 * A274747 A204031 A341084
Adjacent sequences: A274798 A274799 A274800 * A274802 A274803 A274804


KEYWORD

nonn


AUTHOR

R. H. Hardin, Jul 07 2016


STATUS

approved



