A222372 - OEIS

A222372

Number of nX1 0..3 arrays with no more than floor(nX1/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order

1, 1, 1, 4, 5, 14, 17, 75, 95, 411, 519, 2522, 3211, 15919, 20299, 103627, 132515, 683480, 875491, 4554799, 5844093, 30542304, 39239961, 205785953, 264702489, 1391485044, 1791699029, 9436529666, 12161620195, 64150640719, 82742154707

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OFFSET

1,4

COMMENTS

Column 1 of A222378

LINKS

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

EXAMPLE

All solutions for n=4

..0....0....0....0

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

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