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!)
A233301 T(n,k)=Number of (n+1)X(k+1) 0..1 arrays x(i,j) with row sums sum{x(i,j), j=1..k+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing 10

%I

%S 7,13,15,22,42,31,34,105,141,64,50,232,567,502,129,70,475,1986,3556,

%T 1739,258,95,904,6292,21957,21856,5964,515,125,1632,18205,122022,

%U 239330,135636,20185,1029,161,2806,48913,616439,2353493,2694620,836259,67609

%N T(n,k)=Number of (n+1)X(k+1) 0..1 arrays x(i,j) with row sums sum{x(i,j), j=1..k+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing

%C Table starts

%C ....7.....13........22.........34..........50..........70..........95

%C ...15.....42.......105........232.........475.........904........1632

%C ...31....141.......567.......1986........6292.......18205.......48913

%C ...64....502......3556......21957......122022......616439.....2871477

%C ..129...1739.....21856.....239330.....2353493....20916337...170084407

%C ..258...5964....135636....2694620....48504411...789640245.11764401320

%C ..515..20185....836259...30257296..1007309118.30406745215

%C .1029..67609...5134856..338790472.21022231309

%C .2055.224165..31326263.3761876941

%C .4107.737347.190404404

%H R. H. Hardin, <a href="/A233301/b233301.txt">Table of n, a(n) for n = 1..84</a>

%e Some solutions for n=4 k=4

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

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

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

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

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

%Y Row 1 is A002623(n+1)

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_, Dec 07 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 January 28 17:08 EST 2023. Contains 359895 sequences. (Running on oeis4.)