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A255082 T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with no 3x3 subblock diagonal sum one and no antidiagonal sum one 9
208, 676, 676, 2444, 2704, 2444, 8836, 14161, 14161, 8836, 31960, 66049, 103929, 66049, 31960, 115600, 309136, 630436, 630436, 309136, 115600, 418200, 1485961, 4055975, 4906225, 4055975, 1485961, 418200, 1512900, 7070281, 26388769 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

......208.......676........2444..........8836..........31960...........115600

......676......2704.......14161.........66049.........309136..........1485961

.....2444.....14161......103929........630436........4055975.........26388769

.....8836.....66049......630436.......4906225.......40081561........344028304

....31960....309136.....4055975......40081561......442721280.......5286889521

...115600...1485961....26388769.....344028304.....5286889521......87959696400

...418200...7070281...170527280....2916864064....60755627185....1389939607849

..1512900..33686416..1103236225...24655280400...697465500736...21978319114816

..5473500.161417025..7182663455..210761791744..8157711718900..355530634470400

.19802500.772006225.46658160025.1799944224400.95072386757049.5709705914259216

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..542

FORMULA

Empirical for column k:

k=1: a(n) = 5*a(n-1) -25*a(n-3) +25*a(n-4) for n>5

EXAMPLE

Some solutions for n=3 k=4

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

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

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

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

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

CROSSREFS

Sequence in context: A260365 A131686 A235273 * A255075 A304281 A234549

Adjacent sequences:  A255079 A255080 A255081 * A255083 A255084 A255085

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Feb 14 2015

STATUS

approved

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Last modified September 24 22:46 EDT 2021. Contains 347651 sequences. (Running on oeis4.)