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A238254 Number of (n+1)X(7+1) 0..1 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise 0
3249, 90225, 7616082, 640472606, 64353451945, 5017308028639, 395035485087390, 24520763755992781, 1504227932142140703, 75758809125961889230 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A238255

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A204038 A235412 A048421 * A187135 A185840 A251501

Adjacent sequences:  A238251 A238252 A238253 * A238255 A238256 A238257

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 21 2014

STATUS

approved

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Last modified August 19 10:09 EDT 2022. Contains 356228 sequences. (Running on oeis4.)