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A265118 Number of 3Xn arrays containing n copies of 0..3-1 with row sums equal, column sums equal and full-length antidiagonal sums equal to the short dimension sums. 2
0, 0, 8, 6, 10, 26, 42, 70, 150, 282, 506, 1002, 1950, 3670, 7126, 13926, 26826, 52082, 101802, 198146, 386238, 755790, 1478302, 2892442, 5670210, 11122230, 21823494, 42863862, 84247842, 165655146, 325927242, 641635110, 1263690038, 2489962938 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row 3 of A265117.

LINKS

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

FORMULA

G.f.: 2*(r^2-r+1)/sqrt((r-1)*(2*r-1)*(2*r^2+r+1))+2*(r^3-r^2-1)  -Stefan Hollos, Mar 23 2017

EXAMPLE

Some solutions for n=9

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

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

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

CROSSREFS

Cf. A265117.

Sequence in context: A104668 A254337 A053744 * A034085 A303316 A340518

Adjacent sequences:  A265115 A265116 A265117 * A265119 A265120 A265121

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 01 2015

STATUS

approved

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Last modified June 30 02:41 EDT 2022. Contains 354913 sequences. (Running on oeis4.)