A222502 - OEIS

A222502

Number of 3Xn 0..3 arrays with exactly floor(3Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order

0, 4, 6, 35, 81, 1758, 3964, 114039, 249121, 7654526, 17528506, 521272961, 1262530701, 35686911158, 90924250112, 2450312511955, 6543156266427, 168629675723808, 470547135992104

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OFFSET

1,2

COMMENTS

Row 3 of A222500

LINKS

Table of n, a(n) for n=1..19.

EXAMPLE

Some solutions for n=4

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

..0..0..0..0....0..1..1..1....1..1..1..1....0..0..0..0....1..1..1..1

..0..0..0..0....0..1..1..1....1..1..1..1....0..1..0..1....1..1..1..1