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A204051 Number of (n+2)X5 0..3 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..3 introduced in row major order 1
80391, 756338, 5257444, 39646479, 315429190, 2404876738, 18455232523, 141708188218, 1080947863092, 8278402917075, 63528617890314, 486692871562162, 3729534140036939, 28580128199326250, 218948932569435888 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A204056

LINKS

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

FORMULA

Empirical: a(n) = 11*a(n-1) -31*a(n-2) +79*a(n-3) -472*a(n-4) +1932*a(n-5) +2343*a(n-6) -67575*a(n-7) +146489*a(n-8) -117175*a(n-9) +1530642*a(n-10) -3606682*a(n-11) -273862*a(n-12) +16772230*a(n-13) -36299284*a(n-14) +57214908*a(n-15) -450679676*a(n-16) +1029465388*a(n-17) -1009716328*a(n-18) +1262395368*a(n-19) -3104036256*a(n-20) +5553659568*a(n-21) +6848087424*a(n-22) -17980020864*a(n-23) -350054784*a(n-24) -7325373888*a(n-25) +24129328896*a(n-26) +5625189504*a(n-27) -22114632960*a(n-28) +13450924800*a(n-29) -6809163264*a(n-30) +6167549952*a(n-31) -7135008768*a(n-32) +2176782336*a(n-33) for n>34

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A250335 A250080 A251377 * A218248 A102457 A102459

Adjacent sequences:  A204048 A204049 A204050 * A204052 A204053 A204054

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 09 2012

STATUS

approved

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Last modified February 25 05:01 EST 2020. Contains 332217 sequences. (Running on oeis4.)