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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 INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 245 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 STATUS approved

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