A208390 - OEIS

A208390

Number of nX6 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors

122, 76806, 48890520, 31112194860, 19798894881900, 12599441934740388, 8017919094401985204, 5102370957264743298996, 3247000759052439181788564, 2066297024969543787823082196, 1314931443577477050291551747028

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OFFSET

1,1

COMMENTS

Column 6 of A208392

LINKS

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

FORMULA

Empirical: a(n) = 649*a(n-1) -8088*a(n-2) +32724*a(n-3) -69156*a(n-4) +80352*a(n-5) -46656*a(n-6) for n>7

EXAMPLE

Some solutions for n=4

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