A267790 Number of 4Xn 0..1 arrays with every repeated value in every row greater than or equal to, and in every column greater than, the previous repeated value.

9, 81, 729, 5081, 34173, 211555, 1262760, 7263481, 40755550, 223936008, 1210708628, 6459502002, 34095465344, 178380596163, 926424208370, 4781950926795, 24555731443566, 125543243787981, 639444488484051

Offset

1,1

Comments

Row 4 of A267788.

Links

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

R. H. Hardin, Empirical recurrence of order 93

Formula

Empirical recurrence of order 93 (see link above)

Example

Some solutions for n=4
..1..1..1..0....0..1..0..1....0..0..0..1....0..1..1..0....0..0..1..1
..0..0..0..0....1..0..1..0....0..1..0..1....0..0..0..1....1..0..1..0
..1..1..1..1....1..0..0..1....1..1..1..0....1..0..0..1....0..1..0..0
..0..1..0..0....0..1..0..1....0..0..0..1....1..1..1..0....0..1..1..1

Crossrefs

Cf. A267788.

Sequence in context: A171283 A174108 A254435 * A268014 A228972 A125947

Adjacent sequences: A267787 A267788 A267789 * A267791 A267792 A267793

Keyword

nonn

Author

R. H. Hardin, Jan 20 2016

Status

approved