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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A205166 Number of (n+1)X5 0..3 arrays with every 2X2 subblock having unequal diagonal elements or unequal antidiagonal elements, and new values 0..3 introduced in row major order 1
33831, 26702419, 21125224557, 16713430246949, 13223001109687815, 10461512493459648399, 8276732547425415428669, 6548221560172100787717125, 5180692423659560643509585071, 4098757768339496789285781750439 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A205170

LINKS

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

FORMULA

Empirical: a(n) = 833*a(n-1) -33758*a(n-2) +523880*a(n-3) -3857129*a(n-4) +13605853*a(n-5) -17604432*a(n-6) -15652010*a(n-7) +55894364*a(n-8) -22106688*a(n-9) -29904720*a(n-10) +18240672*a(n-11) +492672*a(n-12) -1016064*a(n-13)

EXAMPLE

Some solutions for n=4

..0..0..0..0..1....0..0..0..0..0....0..0..1..0..0....0..0..1..1..0

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

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

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

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

CROSSREFS

Sequence in context: A204949 A268909 A243467 * A238514 A252549 A231196

Adjacent sequences:  A205163 A205164 A205165 * A205167 A205168 A205169

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 22 2012

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 October 24 13:06 EDT 2021. Contains 348231 sequences. (Running on oeis4.)