login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A184238 Number of strings of numbers x(i=1..n) in 0..7 with sum i^2*x(i)^2 equal to n^2*49 1
1, 1, 1, 2, 30, 47, 706, 2108, 19178, 97714, 592976, 4314051, 20748316, 146773816, 682184037, 4255325221, 20091607500, 109644051939, 531805180789, 2616813468267, 12881990830635, 59476915385038, 291195760216883 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Column 7 of A184240

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..24

EXAMPLE

Some solutions for n=5

..0....4....6....6....1....1....2....4....2....6....6....1....4....0....0....2

..5....7....0....3....0....3....7....2....2....4....6....2....1....5....3....7

..5....6....5....4....6....4....4....1....6....6....2....6....6....3....5....5

..0....2....2....7....0....3....4....7....4....6....7....7....4....3....2....5

..6....5....6....3....6....6....5....4....5....3....3....2....5....6....6....4

CROSSREFS

Sequence in context: A113695 A098827 A280380 * A285220 A078208 A105403

Adjacent sequences:  A184235 A184236 A184237 * A184239 A184240 A184241

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 10 2011

STATUS

approved

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 September 22 12:42 EDT 2019. Contains 327307 sequences. (Running on oeis4.)