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A204568 Number of (n+1)X5 0..3 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..3 introduced in row major order 1
1682, 80518, 4220392, 226207388, 12184154082, 657035534014, 35439471578008, 1911668983879844, 103120042408983914, 5562564379359047286, 300059383373323671216, 16185997942290302282060, 873115606316546208696882 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A204572

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 66*a(n-1) -371*a(n-2) -20540*a(n-3) +324789*a(n-4) -1657430*a(n-5) +2548727*a(n-6) +4497416*a(n-7) -19534224*a(n-8) +23561568*a(n-9) -10191744*a(n-10) -1130112*a(n-11) +1975104*a(n-12) -373248*a(n-13)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A069331 A156175 A031760 * A035766 A107562 A031539

Adjacent sequences:  A204565 A204566 A204567 * A204569 A204570 A204571

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 16 2012

STATUS

approved

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Last modified October 23 04:06 EDT 2021. Contains 348211 sequences. (Running on oeis4.)