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!)
A183948 Number of strings of numbers x(i=1..n) in 0..4 with sum i^2*x(i) equal to n^2*4 1

%I

%S 1,2,3,8,27,78,219,649,1805,4987,13179,34331,87203,217281,532073,

%T 1278041,3025466,7046194,16192534,36706373,82197783,181900279,

%U 398099637,862217855,1848842707,3927404946,8267742253,17257223344,35726693834

%N Number of strings of numbers x(i=1..n) in 0..4 with sum i^2*x(i) equal to n^2*4

%C Column 4 of A183953

%H R. H. Hardin, <a href="/A183948/b183948.txt">Table of n, a(n) for n = 1..60</a>

%e Some solutions for n=6

%e ..0....4....2....3....4....0....3....2....2....0....4....0....2....3....4....2

%e ..2....1....2....3....4....3....0....1....4....2....1....3....1....4....1....1

%e ..2....2....1....2....3....0....1....0....2....1....1....1....1....0....4....4

%e ..2....2....4....0....0....2....2....1....0....1....1....3....2....4....4....1

%e ..2....2....1....3....1....4....4....2....0....3....3....3....1....1....0....2

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 08 2011

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 June 13 00:57 EDT 2021. Contains 344980 sequences. (Running on oeis4.)