The On-Line Encyclopedia of Integer Sequences (OEIS)

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A234909

Number of (n+1) X (5+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).
(history; published version)

#6 by Jon E. Schoenfield at Mon Jun 20 01:23:57 EDT 2022

STATUS

editing

approved

#5 by Jon E. Schoenfield at Mon Jun 20 01:23:56 EDT 2022

NAME

Number of (n+1) X (5+1) 0..7 arrays with every 2X2 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant -stress tilted 1X1 1 X 1 tilings).

COMMENTS

Column 5 of A234911

EXAMPLE

Some solutions for n=1:

.. 0.. 4.. 5.. 1.. 3.. 4.... 6.. 3.. 7.. 3.. 6.. 7.... 2.. 4.. 3.. 7.. 6.. 3.... 0.. 3.. 0.. 4.. 0.. 2

.. 2.. 5.. 7.. 2.. 5.. 7.... 4.. 0.. 5.. 2.. 4.. 6.... 0.. 3.. 1.. 6.. 4.. 2.... 2.. 6.. 4.. 7.. 4.. 5

CROSSREFS

Column 5 of A234911.

STATUS

approved

editing

#4 by R. H. Hardin at Wed Jan 01 09:22:28 EST 2014

STATUS

editing

approved

#3 by R. H. Hardin at Wed Jan 01 09:22:25 EST 2014

LINKS

R. H. Hardin, <a href="/A234909/b234909.txt">Table of n, a(n) for n = 1..30</a>

#2 by R. H. Hardin at Wed Jan 01 09:22:10 EST 2014

NAME

allocated for R. H. Hardin

Number of (n+1)X(5+1) 0..7 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant stress tilted 1X1 tilings)

DATA

395992, 5287952, 66054728, 1035687060, 15595734400, 268581208108, 4410133393168, 80151723302880, 1370941526247760, 25729462123401132, 449038140756511800, 8617212783826638192, 152081237998449308184

OFFSET

1,1

COMMENTS

Column 5 of A234911

EXAMPLE

Some solutions for n=1

..0..4..5..1..3..4....6..3..7..3..6..7....2..4..3..7..6..3....0..3..0..4..0..2

..2..5..7..2..5..7....4..0..5..2..4..6....0..3..1..6..4..2....2..6..4..7..4..5

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin, Jan 01 2014

STATUS

approved

editing

#1 by R. H. Hardin at Wed Jan 01 09:16:35 EST 2014

NAME

allocated for R. H. Hardin

KEYWORD

allocated

STATUS

approved