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A250326 Number of length 7+2 0..n arrays with the sum of second differences squared multiplied by some arrangement of +-1 equal to zero 0
212, 5849, 61092, 363457, 1559080, 5237161, 14866258, 37065983, 83449226, 172987415 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A250320

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A082828 A254704 A267062 * A344423 A238023 A204299

Adjacent sequences:  A250323 A250324 A250325 * A250327 A250328 A250329

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 18 2014

STATUS

approved

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Last modified June 14 15:19 EDT 2021. Contains 345025 sequences. (Running on oeis4.)