A210168 - OEIS

A210168

Number of (n+1) X 3 0..3 arrays containing all values 0..3 with every 2 X 2 subblock having two or four distinct values, and new values 0..3 introduced in row major order.

10, 201, 3283, 48577, 679253, 9173091, 121178151, 1578188865, 20364553277, 261193130859, 3336758862031, 42516443800121, 540813127075381, 6871496034443795, 87244283342152055, 1107170119794198769

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OFFSET

1,1

COMMENTS

Column 2 of A210174.

LINKS

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

FORMULA

Empirical: a(n) = 32*a(n-1) -362*a(n-2) +1648*a(n-3) -1561*a(n-4) -7568*a(n-5) +11440*a(n-6) +11360*a(n-7) -14768*a(n-8) -6400*a(n-9) +3840*a(n-10).

EXAMPLE

Some solutions for n=4

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