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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A015350 Gaussian binomial coefficient [ n,7 ] for q = -10. 2
1, -9090909, 91827363728191, -917356280909173462809, 9174480257209191175298447191, -91743885133148835462057759420652809, 917439768771348869854580597622587770347191 (list; graph; refs; listen; history; text; internal format)
OFFSET

7,2

REFERENCES

J. Goldman and G.-C. Rota, The number of subspaces of a vector space, pp. 75-83 of W. T. Tutte, editor, Recent Progress in Combinatorics. Academic Press, NY, 1969.

I. P. Goulden and D. M. Jackson, Combinatorial Enumeration. Wiley, NY, 1983, p. 99.

M. Sved, Gaussians and binomials, Ars. Combinatoria, 17A (1984), 325-351.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 7..100

MATHEMATICA

Table[QBinomial[n, 7, -10], {n, 7, 20}] (* Harvey P. Dale, Mar 22 2012 *)

PROG

(Sage) [gaussian_binomial(n, 7, -10) for n in xrange(7, 14)] # Zerinvary Lajos, May 27 2009

(MAGMA) r:=7; q:=-10; [&*[(1-q^(n-i+1))/(1-q^i): i in [1..r]]: n in [r..15]]; // Vincenzo Librandi, Nov 06 2016

CROSSREFS

Sequence in context: A106787 A105012 A186139 * A233613 A172620 A172711

Adjacent sequences:  A015347 A015348 A015349 * A015351 A015352 A015353

KEYWORD

sign,easy

AUTHOR

Olivier Gérard, Dec 11 1999

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 March 19 03:59 EDT 2019. Contains 321311 sequences. (Running on oeis4.)