login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS").
Other ways to donate

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 December 1 06:09 EST 2020. Contains 338833 sequences. (Running on oeis4.)