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A204740 T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero 8
7, 15, 15, 31, 43, 31, 63, 115, 115, 63, 127, 304, 409, 304, 127, 255, 787, 1389, 1389, 787, 255, 511, 2033, 4658, 6176, 4658, 2033, 511, 1023, 5219, 15327, 26680, 26680, 15327, 5219, 1023, 2047, 13398, 50177, 113694, 150132, 113694, 50177, 13398, 2047 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

....7....15.....31......63......127.......255........511........1023

...15....43....115.....304......787......2033.......5219.......13398

...31...115....409....1389.....4658.....15327......50177......163232

...63...304...1389....6176....26680....113694.....476919.....1988919

..127...787...4658...26680...150132....825967....4484324....24023995

..255..2033..15327..113694...825967...5920734...41716355...290523224

..511..5219..50177..476919..4484324..41716355..384523522..3504247804

.1023.13398.163232.1988919.24023995.290523224.3504247804.42202897239

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..220

EXAMPLE

Some solutions for n=4 k=3

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

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

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

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

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

CROSSREFS

Column 1 is A000225(n+2)

Sequence in context: A234861 A076401 A180114 * A244536 A237054 A216848

Adjacent sequences:  A204737 A204738 A204739 * A204741 A204742 A204743

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Jan 18 2012

STATUS

approved

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Last modified October 20 07:33 EDT 2019. Contains 328252 sequences. (Running on oeis4.)