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!)
A178353 Number of collinear point 4-tuples in a 7 X 7 X 7 X ... n-dimensional cubic grid 2
0, 35, 660, 9767, 135240, 1856075, 25897500, 371453327, 5493496080, 83634563315 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
Conjecture: a(n) = 3*13^n/2+3*11^n+9^(n+1)/2-19*7^n/2+17^n/2 ; a(n) = +57*a(n-1) -1270*a(n-2) +13830*a(n-3) -73609*a(n-4) +153153*a(n-5). G.f: x*(-35+1335*x-16597*x^2+67329*x^3) / ( (11*x-1)*(13*x-1)*(17*x-1)*(9*x-1)*(7*x-1) ). [R. J. Mathar May 25 2010]
CROSSREFS
Sequence in context: A162384 A126925 A010987 * A202127 A175774 A112504
KEYWORD
nonn
AUTHOR
R. H. Hardin, suggested by R. J. Mathar in the Sequence Fans Mailing List, May 25 2010
STATUS
approved

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 June 22 12:55 EDT 2024. Contains 373571 sequences. (Running on oeis4.)