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!)
A223797 Number of nX4 0..3 arrays with rows and antidiagonals unimodal 1
130, 16900, 1658703, 151310069, 13602542576, 1216562667529, 108631485025292, 9695922803812530, 865293308203272685, 77218182866179219113, 6890814828420641198100, 614921940899081513160269 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A223801

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 130*a(n-1) -4151*a(n-2) +55367*a(n-3) -1103289*a(n-4) +25676564*a(n-5) -311713584*a(n-6) +2153547070*a(n-7) -14084700670*a(n-8) +111538734736*a(n-9) -678666743150*a(n-10) +3151156493032*a(n-11) -15705615808280*a(n-12) +74227237529348*a(n-13) -265525650225285*a(n-14) +858145104057893*a(n-15) -2835818034237058*a(n-16) +7784228337705693*a(n-17) -17375928755819704*a(n-18) +37062908059029592*a(n-19) -69764230981154356*a(n-20) +99762651233668576*a(n-21) -119132184363098064*a(n-22) +127177566453563712*a(n-23) -90807087696380928*a(n-24) +28396177139635200*a(n-25) -1473691515457536*a(n-26) +18962192793600*a(n-27)

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A223758 A223846 A223872 * A243480 A223662 A224112

Adjacent sequences:  A223794 A223795 A223796 * A223798 A223799 A223800

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 27 2013

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 May 24 00:15 EDT 2022. Contains 353993 sequences. (Running on oeis4.)