login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A250319 Number of length n+2 0..7 arrays with the sum of second differences squared multiplied by some arrangement of +-1 equal to zero 0
32, 480, 1152, 14452, 119004, 1357424, 14866258, 166783380, 1809575752 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A250320

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=5

..6....3....2....3....2....7....6....0....1....5....0....4....7....3....3....6

..4....3....6....3....2....6....7....4....1....2....5....1....3....3....7....2

..3....6....4....2....5....6....5....3....2....2....1....3....1....3....0....5

..2....0....4....2....3....7....4....4....0....0....6....0....2....2....5....1

..2....3....0....4....4....7....7....6....6....0....6....2....1....5....6....5

..1....1....7....6....2....5....7....4....3....4....2....0....1....4....4....0

..1....3....1....6....4....2....6....4....3....7....1....1....5....4....6....4

CROSSREFS

Sequence in context: A284339 A125467 A282525 * A000152 A319307 A022069

Adjacent sequences:  A250316 A250317 A250318 * A250320 A250321 A250322

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 18 2014

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 11 22:31 EST 2019. Contains 329046 sequences. (Running on oeis4.)