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A254848 Number of (n+2)X(2+2) 0..1 arrays with no 3x3 subblock diagonal sum one and no antidiagonal sum two 1
576, 1369, 2916, 6889, 16900, 42436, 103684, 250000, 595984, 1447209, 3541924, 8761600, 21399876, 52186176, 126067984, 306915361, 746710276, 1830556225, 4462774416, 10904371776, 26485609536, 64593747409, 157115518884 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A254854

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A064253 A069266 A060678 * A235181 A268773 A250789

Adjacent sequences:  A254845 A254846 A254847 * A254849 A254850 A254851

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 08 2015

STATUS

approved

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Last modified May 16 11:35 EDT 2022. Contains 353704 sequences. (Running on oeis4.)