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!)
A250539 Number of (n+1)X(3+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)-x(i-1,j) in the j direction 1
6627, 79366, 644779, 4169584, 23289547, 117777788, 555362165, 2489782728, 10756619019, 45218540866, 186284270079, 756106728264, 3036114535027, 12099190503944, 47969168390489, 189564322191712, 747765014131475 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A250544
LINKS
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=2
..3..3..2..2....2..0..0..0....3..3..3..0....3..2..3..2....3..1..0..0
..2..2..3..3....1..2..3..3....1..1..1..0....2..1..2..1....0..1..0..0
..0..1..3..3....0..1..2..3....1..2..2..1....1..0..2..1....0..1..1..1
CROSSREFS
Sequence in context: A237726 A345561 A345816 * A251796 A237794 A237792
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 24 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 25 05:27 EDT 2024. Contains 373697 sequences. (Running on oeis4.)