A222770 Number of 2Xn 0..1 arrays with exactly floor(2Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order

0, 3, 4, 11, 18, 73, 152, 470, 1022, 3361, 7840, 23386, 57626, 172387, 434280, 1257025, 3275034, 9399647, 24776572, 70325187, 188540168, 531573662, 1436226680, 4032772569, 10987025446, 30742228871, 84180549328, 235159618106

Offset

1,2

Comments

Row 2 of A222769

Links

R. H. Hardin, Table of n, a(n) for n = 1..107

Example

All solutions for n=3
..0..0..0....0..0..0....0..0..1....0..0..1
..0..1..1....1..0..0....1..1..1....0..0..0

Crossrefs

Sequence in context: A339157 A060285 A025079 * A036652 A295962 A097072

Adjacent sequences: A222767 A222768 A222769 * A222771 A222772 A222773

Keyword

nonn

Author

R. H. Hardin Mar 05 2013

Status

approved