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!)
A250637 Number of (5+1)X(n+1) 0..2 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction 1
2856, 20743, 134878, 747039, 3719562, 17202711, 75537881, 319253573, 1310889946, 5265378033, 20784710664, 80962828536, 312026929609, 1192861371366, 4530539131712, 17123596908104, 64464780855588, 241988292316472 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 5 of A250632
LINKS
FORMULA
Empirical: a(n) = 20*a(n-1) -142*a(n-2) +208*a(n-3) +2725*a(n-4) -15261*a(n-5) +8294*a(n-6) +172548*a(n-7) -521171*a(n-8) -395240*a(n-9) +4773332*a(n-10) -5923544*a(n-11) -17684878*a(n-12) +55922728*a(n-13) +996884*a(n-14) -217723306*a(n-15) +252927943*a(n-16) +384433618*a(n-17) -1078638107*a(n-18) +110644587*a(n-19) +2220540447*a(n-20) -2100319081*a(n-21) -2131014704*a(n-22) +4834767824*a(n-23) -525198323*a(n-24) -5572935189*a(n-25) +4122094724*a(n-26) +2960973976*a(n-27) -5263643960*a(n-28) +529467255*a(n-29) +3343709842*a(n-30) -1909188069*a(n-31) -942962634*a(n-32) +1297322988*a(n-33) -116323104*a(n-34) -429249290*a(n-35) +183224257*a(n-36) +60177703*a(n-37) -61346606*a(n-38) +4409663*a(n-39) +9604059*a(n-40) -2885635*a(n-41) -571361*a(n-42) +407795*a(n-43) -25859*a(n-44) -22758*a(n-45) +4716*a(n-46) +224*a(n-47) -149*a(n-48) +12*a(n-49) for n>54
EXAMPLE
Some solutions for n=3
..0..0..0..1....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..1
..0..0..0..2....0..0..0..1....0..0..0..0....1..0..0..0....0..0..0..1
..0..1..1..1....0..0..0..2....0..0..0..0....0..1..0..2....0..0..0..2
..1..1..1..1....1..0..1..1....0..0..1..2....2..0..1..1....1..0..1..1
..1..1..1..1....0..1..1..2....1..1..2..2....0..2..2..2....0..1..1..1
..2..2..1..1....0..2..2..2....1..1..2..2....0..2..2..2....1..1..2..2
CROSSREFS
Sequence in context: A345588 A345846 A233788 * A067703 A253714 A031603
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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 23 04:24 EDT 2024. Contains 374544 sequences. (Running on oeis4.)