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!)
A250697 Number of (6+1)X(n+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction 2
233300, 1647460, 8474002, 36673634, 143136866, 523260542, 1832718604, 6241479780, 20880237460, 69123618848, 227638279630, 748479312062, 2463064051982, 8124116088970, 26881398786600, 89272256311120 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 6 of A250691

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..55

FORMULA

Empirical: a(n) = 30*a(n-1) -415*a(n-2) +3514*a(n-3) -20386*a(n-4) +85924*a(n-5) -272198*a(n-6) +661180*a(n-7) -1244717*a(n-8) +1822478*a(n-9) -2068955*a(n-10) +1802474*a(n-11) -1181760*a(n-12) +563888*a(n-13) -184752*a(n-14) +37152*a(n-15) -3456*a(n-16)

EXAMPLE

Some solutions for n=1

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A257638 A116463 A015331 * A250682 A238500 A224656

Adjacent sequences:  A250694 A250695 A250696 * A250698 A250699 A250700

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 26 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 September 23 12:53 EDT 2020. Contains 337310 sequences. (Running on oeis4.)