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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A015211 Sum of Gaussian binomial coefficients for q=20. 2
1, 2, 23, 844, 185665, 135410486, 594398635307, 8667459765860128, 760847587518093084949, 221888491692526853220309770, 389554408585486196960076347534591, 2272138934040070259456673438099474759412 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

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 = 0..50

Kent E. Morrison, Integer Sequences and Matrices Over Finite Fields, Journal of Integer Sequences, Vol. 9 (2006), Article 06.2.1.

FORMULA

a(0) = 1, a(1) = 2, a(n) = 2*a(n-1) + a(n-2)*((20^(n-1)) - 1). - Vincenzo Librandi, Nov 02 2012

MATHEMATICA

Total/@Table[QBinomial[n, m, 20], {n, 0, 20}, {m, 0, n}] (* Vincenzo Librandi, Nov 02 2012 *)

CROSSREFS

Row sums of triangle A022184.

Sequence in context: A237580 A273976 A098633 * A266992 A079480 A239398

Adjacent sequences:  A015208 A015209 A015210 * A015212 A015213 A015214

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Olivier Gérard

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 June 2 10:12 EDT 2020. Contains 334769 sequences. (Running on oeis4.)