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A008650 Molien series of 4 X 4 upper triangular matrices over GF( 3 ). 2
1, 1, 1, 2, 2, 2, 3, 3, 3, 5, 5, 5, 7, 7, 7, 9, 9, 9, 12, 12, 12, 15, 15, 15, 18, 18, 18, 23, 23, 23, 28, 28, 28, 33, 33, 33, 40, 40, 40, 47, 47, 47, 54, 54, 54, 63, 63, 63, 72, 72, 72, 81, 81, 81, 93, 93, 93, 105, 105 (list; graph; refs; listen; history; internal format)
OFFSET

0,4

REFERENCES

D. J. Benson, Polynomial Invariants of Finite Groups, Cambridge, 1993, p. 105.

LINKS

INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 235

Index entries for Molien series

MAPLE

1/(1-x)/(1-x^3)/(1-x^9)/(1-x^27)

CROSSREFS

Sequence in context: A032562 A076973 A008649 * A062051 A179269 A108711

Adjacent sequences:  A008647 A008648 A008649 * A008651 A008652 A008653

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 17 19:13 EST 2012. Contains 206085 sequences.