A218525 Number of 4Xn arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random 0..3 4Xn array

256, 1528, 76214, 1608968, 49466988, 1326731972, 38497164700, 1087736452738, 31117471227206, 886142080344254, 25291550132660836, 721303064302959840, 20578939287128886034, 587046975916765583280, 16747555229309088955058

Offset

1,1

Comments

Row 4 of A218522

Links

R. H. Hardin, Table of n, a(n) for n = 1..90

Example

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

Crossrefs

Sequence in context: A197709 A198073 A197907 * A237403 A237399 A237677

Adjacent sequences: A218522 A218523 A218524 * A218526 A218527 A218528

Keyword

nonn

Author

R. H. Hardin Oct 31 2012

Status

approved