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

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A239027 Number of nX5 0..2 arrays with no element equal to the sum of elements to its left or one plus the sum of elements above it, modulo 3 1
1, 6, 16, 110, 354, 2592, 9319, 69288, 265247, 1965398, 7800825, 57331200, 232485057, 1695069696, 6964531270, 50452937884, 209015936546, 1506842267076, 6275879711407, 45084885342398, 188433761914537, 1350270184320046 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 5 of A239030

LINKS

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

FORMULA

Empirical: a(n) = 167*a(n-2) -12737*a(n-4) +590522*a(n-6) -18674960*a(n-8) +428232709*a(n-10) -7384832953*a(n-12) +97981999331*a(n-14) -1014383126841*a(n-16) +8257937387592*a(n-18) -53002256526176*a(n-20) +267655608403835*a(n-22) -1056157718233604*a(n-24) +3216196113264380*a(n-26) -7411332048725488*a(n-28) +12543993016224416*a(n-30) -14892794784221696*a(n-32) +11503438838397440*a(n-34) -5030303892805632*a(n-36) +890642713919488*a(n-38)

EXAMPLE

Some solutions for n=5

..2..0..0..0..0....2..0..0..0..0....2..0..0..0..0....2..0..0..0..0

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

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

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

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

CROSSREFS

Sequence in context: A009354 A034191 A115331 * A218976 A173737 A152663

Adjacent sequences:  A239024 A239025 A239026 * A239028 A239029 A239030

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 09 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 January 16 23:44 EST 2019. Contains 319206 sequences. (Running on oeis4.)