A232260 Number of (3+1)X(n+1) 0..2 arrays with every element both >= and <= some horizontal or antidiagonal neighbor

163, 4711, 175431, 7258599, 304291873, 12652519297, 526801789327, 21934670001645, 913277468672577, 38025499509371263, 1583240469955789117, 65920270839189410847, 2744676006495753336981, 114278144013102793338431

Offset

1,1

Comments

Row 3 of A232257

Links

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

Example

Some solutions for n=3
..0..0..2..2....0..0..2..2....0..0..0..1....0..0..1..1....0..0..0..2
..2..2..0..0....1..2..2..2....0..2..2..2....1..1..1..2....0..2..2..2
..1..1..0..2....2..1..2..1....1..0..0..1....1..1..2..2....2..0..0..1
..1..0..2..2....1..1..0..0....0..1..2..2....0..0..0..0....1..1..1..1

Crossrefs

Sequence in context: A217644 A185500 A305723 * A027543 A222837 A134160

Adjacent sequences: A232257 A232258 A232259 * A232261 A232262 A232263

Keyword

nonn

Author

R. H. Hardin, Nov 21 2013

Status

approved