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!)
A263337 T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with each row and column divisible by 13, read as a base-3 number with top and left being the most significant digits. 3
3, 7, 7, 19, 19, 19, 57, 57, 57, 57, 169, 409, 277, 409, 169, 505, 2047, 8983, 8983, 2047, 505, 1515, 10747, 86743, 702549, 86743, 10747, 1515, 4543, 70423, 1242727, 18071161, 18071161, 1242727, 70423, 4543, 13627, 427507, 24783643, 805620145 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

....3.....7......19.......57......169.......505.....1515...4543.13627

....7....19......57......409.....2047.....10747....70423.427507

...19....57.....277.....8983....86743...1242727.24783643

...57...409....8983...702549.18071161.805620145

..169..2047...86743.18071161

..505.10747.1242727

.1515.70423

.4543

LINKS

Table of n, a(n) for n=1..40.

FORMULA

Empirical for column k:

k=1: a(n) = 3*a(n-1) +a(n-3) -3*a(n-4)

EXAMPLE

Some solutions for n=3 k=4

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

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

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

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

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

CROSSREFS

Sequence in context: A240427 A239047 A229521 * A160994 A113833 A212286

Adjacent sequences:  A263334 A263335 A263336 * A263338 A263339 A263340

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Oct 15 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 22 23:09 EST 2021. Contains 340383 sequences. (Running on oeis4.)