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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A046163 Reduced denominators of (n-1)^2/(n^2+n+1). Arises in Routh's theorem. 5
1, 7, 13, 7, 31, 43, 19, 73, 91, 37, 133, 157, 61, 211, 241, 91, 307, 343, 127, 421, 463, 169, 553, 601, 217, 703, 757, 271, 871, 931, 331, 1057, 1123, 397, 1261, 1333, 469, 1483, 1561, 547, 1723, 1807, 631, 1981, 2071, 721, 2257, 2353, 817, 2551, 2653 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..51.

Eric Weisstein's World of Mathematics, Routh's Theorem.

FORMULA

G.f.: x(x^8+x^7+x^6+4x^5+10x^4+4x^3+13x^2+7x+1)/(1-x^3)^3.

CROSSREFS

Cf. A046162.

Sequence in context: A157517 A164929 A081257 * A130770 A158622 A215990

Adjacent sequences:  A046160 A046161 A046162 * A046164 A046165 A046166

KEYWORD

nonn

AUTHOR

Eric W. Weisstein

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 23 21:14 EDT 2018. Contains 316541 sequences. (Running on oeis4.)