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!)
A235415 Number of (n+1)X(3+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise 1

%I #4 Jan 10 2014 07:11:30

%S 22500,1826923,149643266,9676094946,623604857055,32662713888028,

%T 1724073736174640,76002795623829546,3387480212316840735,

%U 129022109042050899256,4972470574066747942531,166872014375969665991253

%N Number of (n+1)X(3+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise

%C Column 3 of A235416

%H R. H. Hardin, <a href="/A235415/b235415.txt">Table of n, a(n) for n = 1..28</a>

%e Some solutions for n=1

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 10 2014

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 August 29 12:23 EDT 2024. Contains 375517 sequences. (Running on oeis4.)