A258689 T(n,k)=Number of (n+3)X(k+3) 0..1 arrays with no 4x4 subblock diagonal sum less than the antidiagonal sum

41728, 386304, 386304, 3512272, 5392960, 3512272, 27566112, 58713912, 58713912, 27566112, 202381312, 479373352, 730627431, 479373352, 202381312, 1439941888, 4020536064, 5979059398, 5979059398, 4020536064, 1439941888, 9687764256

Offset

1,1

Comments

Table starts

......41728......386304......3512272......27566112.....202381312....1439941888

.....386304.....5392960.....58713912.....479373352....4020536064...28017797984

....3512272....58713912....730627431....5979059398...52832293444..341477947200

...27566112...479373352...5979059398...38427363716..282329901252.1449214072632

..202381312..4020536064..52832293444..282329901252.1840394397973.7933658831926

.1439941888.28017797984.341477947200.1449214072632.7933658831926

Links

R. H. Hardin, Table of n, a(n) for n = 1..59

Formula

Empirical for column k:

k=1: [linear recurrence of order 45]

Example

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

Crossrefs

Sequence in context: A248445 A339796 A251978 * A258685 A031849 A151818

Adjacent sequences: A258686 A258687 A258688 * A258690 A258691 A258692

Keyword

nonn,tabl

Author

R. H. Hardin, Jun 07 2015

Status

approved