login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS").
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A202070 Number of arrays of n+2 integers in -2..2 with sum zero and the sum of every adjacent pair being odd 1
4, 20, 26, 0, 96, 524, 726, 0, 2760, 15560, 22084, 0, 85120, 487564, 700966, 0, 2723256, 15746520, 22820940, 0, 89115840, 518517560, 755594620, 0, 2961237136, 17306539536, 25319793096, 0, 99494853120, 583417062540, 856125569286, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A202076

LINKS

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

EXAMPLE

Some solutions for n=10

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

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

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

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

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

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A032425 A194045 A097251 * A198831 A323040 A259755

Adjacent sequences:  A202067 A202068 A202069 * A202071 A202072 A202073

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 10 2011

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 27 07:00 EST 2020. Contains 338679 sequences. (Running on oeis4.)