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A206379 Number of (n+1)X5 0..3 arrays with every 2X2 subblock having the same number of equal diagonal or antidiagonal elements, and new values 0..3 introduced in row major order 1
5257, 520097, 57656713, 6554439373, 748963157161, 85678539791333, 9803619036105721, 1121819841273065957, 128370307988576256937, 14689502396007272718677, 1680930696757228231925017 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A206383

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..107

FORMULA

Empirical: a(n) = 160*a(n-1) -5537*a(n-2) +25556*a(n-3) +1495902*a(n-4) -23370552*a(n-5) +81849864*a(n-6) +544237824*a(n-7) -5119960320*a(n-8) +15199301376*a(n-9) -19180578816*a(n-10) +8497004544*a(n-11)

EXAMPLE

Some solutions for n=4

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

..2..2..3..2..3....1..1..1..0..2....1..1..1..0..3....1..2..1..3..2

..3..0..0..0..1....3..1..2..1..0....2..1..2..1..0....0..3..0..0..2

..3..1..1..2..1....1..2..2..2..1....2..2..2..2..1....1..1..1..1..1

..3..0..3..0..3....0..1..2..0..2....0..2..0..2..2....2..2..2..2..0

CROSSREFS

Sequence in context: A124658 A256745 A206165 * A234229 A143936 A204281

Adjacent sequences:  A206376 A206377 A206378 * A206380 A206381 A206382

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 07 2012

STATUS

approved

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Last modified June 22 21:29 EDT 2021. Contains 345393 sequences. (Running on oeis4.)