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A008645 Molien series of 6 X 6 upper triangular matrices over GF( 2 ). 2
1, 1, 2, 2, 4, 4, 6, 6, 10, 10, 14, 14, 20, 20, 26, 26, 36, 36, 46, 46, 60, 60, 74, 74, 94, 94, 114, 114, 140, 140, 166, 166, 202, 202, 238, 238, 284, 284, 330, 330, 390, 390, 450, 450, 524, 524, 598, 598 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Different from A018819 (see g.f.). - Joerg Arndt, Apr 22 2016

REFERENCES

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

LINKS

Table of n, a(n) for n=0..47.

INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 245

Index entries for Molien series

Index entries for linear recurrences with constant coefficients, signature (1, 1, -1, 1, -1, -1, 1, 1, -1, -1, 1, -1, 1, 1, -1, 1, -1, -1, 1, -1, 1, 1, -1, -1, 1, 1, -1, 1, -1, -1, 1, 1, -1, -1, 1, -1, 1, 1, -1, -1, 1, 1, -1, 1, -1, -1, 1, -1, 1, 1, -1, 1, -1, -1, 1, 1, -1, -1, 1, -1, 1, 1, -1).

FORMULA

G.f.: 1/(1-x)/(1-x^2)/(1-x^4)/(1-x^8)/(1-x^16)/(1-x^32).

MATHEMATICA

CoefficientList[Series[1/(1-x)/(1-x^2)/(1-x^4)/(1-x^8)/(1-x^16)/(1-x^32), {x, 0, 100}], x] (* Vaclav Kotesovec, Apr 22 2016 *)

CROSSREFS

Sequence in context: A184157 A008643 A008644 * A018819 A211511 A211513

Adjacent sequences:  A008642 A008643 A008644 * A008646 A008647 A008648

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified February 16 02:32 EST 2019. Contains 320140 sequences. (Running on oeis4.)