A237031 Number of (n+1)X(4+1) 0..2 arrays with the maximum of every 2X2 subblock equal

30045, 4552617, 638436002, 93104881597, 13403891066319, 1939706609440732, 280172591227575985, 40497311726696094149, 5852090517167756717290, 845745023461417965044873, 122222609677627142874842731

Offset

1,1

Comments

Column 4 of A237035

Links

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

Formula

Empirical: a(n) = 120*a(n-1) +6153*a(n-2) -363748*a(n-3) -3957016*a(n-4) +306155172*a(n-5) -1955225983*a(n-6) -32438472776*a(n-7) +200128530735*a(n-8) +1410935167008*a(n-9) -3399280459696*a(n-10) -9790743035136*a(n-11) +31593008567296*a(n-12) -23604586610688*a(n-13) -806694420480*a(n-14) +4431324119040*a(n-15)

Example

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

Crossrefs

Sequence in context: A031853 A066576 A104877 * A027665 A260459 A202598

Adjacent sequences: A237028 A237029 A237030 * A237032 A237033 A237034

Keyword

nonn

Author

R. H. Hardin, Feb 02 2014

Status

approved