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A258904 Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal median plus antidiagonal median nondecreasing horizontally and vertically 1
2736, 15416, 86968, 510095, 2769733, 14722533, 77704089, 402403692, 2062226823, 10488813781, 52939478488, 265527812185, 1324994602509, 6581490633215, 32559651513057, 160510299526305, 788781424462817, 3865274521037444 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A258910

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Cf. A258910

Sequence in context: A122473 A253994 A253987 * A221976 A094401 A035774

Adjacent sequences:  A258901 A258902 A258903 * A258905 A258906 A258907

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 14 2015

STATUS

approved

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Last modified October 16 12:35 EDT 2018. Contains 316263 sequences. (Running on oeis4.)