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

 

Logo

Many excellent designs for a new banner were submitted. We will use the best of them in rotation.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A100025 Molien series for complete weight enumerators of trace-additive Hermitian self-dual codes over the Galois ring GR(4,2) that contain the all-ones vector. 0
1, 1, 7, 21, 92, 291, 981, 2871, 8134, 21131, 52481, 122759, 275356, 590289, 1220811, 2436045, 4715827, 8866230, 16246890, 29054190, 50830264, 87104226, 146467614, 241934106, 393098860, 628867434, 991602894, 1542350194, 2368492984, 3593354974 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..29.

G. Nebe, E. M. Rains and N. J. A. Sloane, Self-Dual Codes and Invariant Theory, Springer, Berlin, 2006.

Index entries for Molien series

FORMULA

G.f.: u1/u2 where u1 := f(t) + t^(-41)f(1/t), u2 := (1-t)*(1-t^2)^6*(1-t^4)^7*(1-t^8)^2 and

f(t) := 1 + 14*t^3 + 43*t^4 + 115*t^5 + 334*t^6 + 808*t^7 + 1752*t^8 + 3557*t^9 + 6448*t^10 + 10800*t^11 + 17020*t^12 + 24972*t^13 + 34704*t^14 + 45824*t^15 + 57298*t^16 + 68464*t^17 + 78120*t^18 + 85092*t^19 + 88922*t^20.

CROSSREFS

Sequence in context: A114902 A177369 A164544 * A121157 A219152 A038184

Adjacent sequences:  A100022 A100023 A100024 * A100026 A100027 A100028

KEYWORD

nonn

AUTHOR

G. Nebe (nebe(AT)math.rwth-aachen.de), Nov 10, 2004

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified April 20 06:17 EDT 2014. Contains 240779 sequences.