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A008648 Molien series of 3 X 3 upper triangular matrices over GF( 5 ). 2
1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 7, 7, 7, 7, 7, 9, 9, 9, 9, 9, 11, 11, 11, 11, 11, 13, 13, 13, 13, 13, 15, 15, 15, 15, 15, 18, 18, 18, 18, 18, 21, 21, 21, 21, 21, 24, 24, 24, 24, 24 (list; graph; refs; listen; history; internal format)
OFFSET

0,6

REFERENCES

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

LINKS

INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 221

Index entries for Molien series

FORMULA

floor((n+4)/5), n>0.

MAPLE

1/(1-x)/(1-x^5)/(1-x^25)

CROSSREFS

Cf. A002266.

Sequence in context: A105512 A002266 A075249 * A154099 A105511 A187183

Adjacent sequences:  A008645 A008646 A008647 * A008649 A008650 A008651

KEYWORD

nonn,easy

AUTHOR

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

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Last modified February 16 15:27 EST 2012. Contains 205930 sequences.