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A236746 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the upper median plus the lower median of every 2X2 subblock equal 9
81, 267, 267, 833, 1411, 833, 2907, 7377, 7377, 2907, 10233, 46377, 68839, 46377, 10233, 37467, 300555, 810039, 810039, 300555, 37467, 139201, 2045011, 9665961, 17740369, 9665961, 2045011, 139201, 526395, 14169625, 119169209, 385709603 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

......81........267...........833.............2907...............10233

.....267.......1411..........7377............46377..............300555

.....833.......7377.........68839...........810039.............9665961

....2907......46377........810039.........17740369...........385709603

...10233.....300555.......9665961........385709603.........14977205669

...37467....2045011.....119169209.......8588436417........593841590295

..139201...14169625....1475983975.....191076235235......23440803949645

..526395...99629489...18374935939....4264088666817.....927678773727315

.2012217..705755971..229046649189...95158587393555...36689437705628373

.7766523.5023764027.2857763330357.2124503121319369.1451552556039929475

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..180

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 9]

k=2: [order 18]

k=3: [order 38]

k=4: [order 86]

EXAMPLE

Some solutions for n=3 k=4

..0..1..0..1..1....0..0..0..0..0....0..1..0..1..0....0..1..1..1..2

..1..1..1..2..0....2..0..1..0..0....1..1..1..1..1....1..1..2..1..0

..0..2..1..0..2....0..0..0..0..2....2..0..1..0..2....0..1..1..1..2

..2..0..1..2..0....0..0..2..0..0....0..2..1..1..1....1..1..2..0..1

CROSSREFS

Sequence in context: A340697 A237637 A237630 * A236739 A237234 A237227

Adjacent sequences: A236743 A236744 A236745 * A236747 A236748 A236749

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 30 2014

STATUS

approved

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Last modified January 26 22:13 EST 2023. Contains 359836 sequences. (Running on oeis4.)