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!)
A223617 Number of nX5 0..1 arrays with rows and columns unimodal 1

%I

%S 16,256,2582,17594,89630,367216,1271969,3857481,10504174,26169386,

%T 60506898,131289614,269716032,528358366,992720569,1797620937,

%U 3149899316,5359276060,8879561670,14362835354,22729680458,35259087700,53702216265

%N Number of nX5 0..1 arrays with rows and columns unimodal

%C Column 5 of A223620

%H R. H. Hardin, <a href="/A223617/b223617.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = (359/453600)*n^10 + (251/30240)*n^9 + (3817/60480)*n^8 + (73/280)*n^7 + (1127/1350)*n^6 + (485/288)*n^5 + (532219/181440)*n^4 + (25699/7560)*n^3 + (30811/8400)*n^2 + (451/210)*n + 1

%e Some solutions for n=4

%e ..1..1..1..1..1....1..1..1..0..0....1..1..0..0..0....0..1..1..1..1

%e ..0..1..1..1..1....0..1..1..1..0....0..0..0..1..0....0..1..1..1..0

%e ..0..0..0..0..0....0..0..1..1..0....0..0..0..1..1....1..1..1..0..0

%e ..0..0..0..0..0....0..0..0..0..0....0..0..1..1..1....1..1..1..0..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 24 2013

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 26 17:17 EST 2020. Contains 331280 sequences. (Running on oeis4.)