The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A263218 Number of (n+1)X(2+1) 0..2 arrays with each row and column divisible by 5, read as a base-3 number with top and left being the most significant digits. 1
2, 14, 72, 343, 1920, 11444, 68112, 405019, 2422502, 14527358, 87130296, 522558079, 3134839248, 18808467356, 112848487824, 677075548723, 4062417593558, 24374464952438, 146246626666296, 877478675492551, 5264869525163232 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 2 of A263224.
LINKS
FORMULA
Empirical: a(n) = 8*a(n-1) -16*a(n-2) +32*a(n-3) +35*a(n-4) -664*a(n-5) +1328*a(n-6) -2656*a(n-7) +3121*a(n-8) +6904*a(n-9) -13808*a(n-10) +27616*a(n-11) -40643*a(n-12) -6248*a(n-13) +12496*a(n-14) -24992*a(n-15) +37488*a(n-16)
EXAMPLE
Some solutions for n=4
..2..2..1....1..2..0....0..1..2....0..1..2....0..1..2....0..0..0....2..2..1
..1..0..1....2..2..1....1..2..0....1..2..0....1..0..1....1..2..0....1..0..1
..2..2..1....0..0..0....2..2..1....2..0..2....0..1..2....0..0..0....2..2..1
..1..0..1....0..1..2....1..0..1....0..0..0....1..0..1....2..2..1....2..0..2
..0..0..0....0..1..2....2..2..1....0..0..0....0..0..0....2..0..2....2..0..2
CROSSREFS
Cf. A263224.
Sequence in context: A094583 A002058 A095933 * A189305 A043011 A290698
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 12 2015
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 12 21:26 EDT 2024. Contains 373360 sequences. (Running on oeis4.)