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A258546 Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically 1
16, 112, 598, 1891, 5070, 10854, 21653, 38451, 64507, 100830, 153641, 223684, 317754, 436768, 592439, 784607, 1024843, 1313644, 1669887, 2091844, 2597102, 3185410, 3884481, 4690355, 5627875, 6695714, 7932093, 9330156, 10923242 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A258554

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..69

EXAMPLE

Some solutions for n=4

..1..0..0..0..0....1..0..0..0..0....0..0..1..0..0....0..1..1..1..1

..1..0..0..0..0....1..0..0..0..0....1..1..0..0..1....0..0..0..0..0

..1..0..0..0..0....1..0..0..0..0....1..0..0..1..1....1..1..1..1..1

..1..0..0..0..0....1..1..1..1..1....1..0..1..1..0....0..0..0..0..0

..0..0..0..0..0....1..1..0..0..1....0..1..1..0..1....1..1..1..1..1

CROSSREFS

Cf. A258554

Sequence in context: A144449 A035016 A000143 * A205964 A222113 A229531

Adjacent sequences:  A258543 A258544 A258545 * A258547 A258548 A258549

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 03 2015

STATUS

approved

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Last modified February 24 04:36 EST 2020. Contains 332197 sequences. (Running on oeis4.)