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A203372 Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements 1
12, 164, 5208, 387324, 67731264, 27913330472, 27149753088792, 62383316832685348, 338853014329060508760, 4353185098169744392741448, 132316928041105714306034574480, 9518293354852895518368238072987352 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A203378

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..14

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A282010 A143583 A231541 * A193104 A046174 A055760

Adjacent sequences:  A203369 A203370 A203371 * A203373 A203374 A203375

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 31 2011

STATUS

approved

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Last modified May 26 04:43 EDT 2022. Contains 354074 sequences. (Running on oeis4.)