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!)
A224124 Number of 2Xn 0..3 arrays with row sums nondecreasing and column sums unimodal 1

%I #4 Mar 31 2013 05:24:58

%S 10,150,1747,16782,140210,1050460,7227405,46371039,281020959,

%T 1623035066,9002891450,48234712165,250875276249,1271548675730,

%U 6302249244967,30627310088497,146302624587552,688283767932118,3194839035650041

%N Number of 2Xn 0..3 arrays with row sums nondecreasing and column sums unimodal

%C Row 2 of A224123

%H R. H. Hardin, <a href="/A224124/b224124.txt">Table of n, a(n) for n = 1..72</a>

%e Some solutions for n=3

%e ..2..1..3....1..2..3....2..2..0....1..3..2....3..2..1....0..1..2....1..3..3

%e ..3..3..0....3..2..3....2..3..2....2..3..1....3..1..2....1..2..0....2..3..3

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 31 2013

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 April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)