A203930 Number of (n+1)X5 0..5 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements

527076, 60873876, 7748585676, 1012872412476, 132923754354276, 17475349695161076, 2297197186864332876, 302046352349437619676, 39711002724144659521476, 5221215352191535968288276

Offset

1,1

Comments

Column 4 of A203934

Links

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

Formula

Empirical: a(n) = 91*a(n-1) +7335*a(n-2) -264625*a(n-3) -85500*a(n-4) +10470000*a(n-5) +2475000*a(n-6) -20750000*a(n-7)

Example

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

Crossrefs

Sequence in context: A254039 A170802 A092018 * A215999 A219334 A340304

Adjacent sequences: A203927 A203928 A203929 * A203931 A203932 A203933

Keyword

nonn

Author

R. H. Hardin Jan 08 2012

Status

approved