A222543 Number of 3Xn 0..1 arrays with no more than floor(3Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order

4, 5, 9, 32, 70, 361, 842, 4314, 10268, 51979, 125504, 636450, 1549956, 7874707, 19306562, 98320042, 241866468, 1235742867, 3045772687, 15611773095, 38529726995, 198047702901, 489385598261, 2521222747131, 6237733850714

Offset

1,1

Comments

Row 3 of A222541

Links

R. H. Hardin, Table of n, a(n) for n = 1..77

Example

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

Crossrefs

Sequence in context: A360699 A336661 A352509 * A042221 A341252 A041151

Adjacent sequences: A222540 A222541 A222542 * A222544 A222545 A222546

Keyword

nonn

Author

R. H. Hardin Feb 24 2013

Status

approved