A203927 Number of (n+1)X2 0..5 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements

396, 4356, 47916, 527076, 5797836, 63776196, 701538156, 7716919716, 84886116876, 933747285636, 10271220141996, 112983421561956, 1242817637181516, 13670994008996676, 150380934098963436, 1654190275088597796

Offset

1,1

Comments

Column 1 of A203934

Links

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

Formula

Empirical: a(n) = 36*11^n

Example

Some solutions for n=4
..1..1....3..0....0..4....2..4....1..1....0..5....3..5....5..4....5..4....5..4
..3..1....5..3....5..0....3..2....5..1....5..0....3..3....5..5....3..5....0..5
..5..3....5..5....4..5....4..3....0..5....0..4....5..3....4..5....1..3....4..0
..3..5....1..5....5..3....1..4....5..2....3..0....4..5....0..4....1..1....5..4
..0..3....3..1....3..4....5..1....2..1....4..3....0..4....5..0....4..1....1..5

Crossrefs

Sequence in context: A028299 A205628 A203934 * A205330 A092720 A230732

Adjacent sequences: A203924 A203925 A203926 * A203928 A203929 A203930

Keyword

nonn

Author

R. H. Hardin Jan 08 2012

Status

approved