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A124612 Poincaré series [or Poincare series] P(C_{4,2}; x). 0
1, 2, 6, 14, 34, 68, 144, 276, 534, 974, 1774, 3106, 5410, 9146, 15334, 25158, 40884, 65264, 103204, 160808, 248222, 378350, 571534, 853890, 1264962, 1855638, 2700490, 3895626, 5577846, 7923072, 11176164, 15650712, 21774473, 30092868, 41337096, 56434524 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..35.

Dragomir Z. Djokovic, Poincaré series [or Poincare series] of some pure and mixed trace algebras of two generic matrices. See Table 3, lines 6 and 7, also Table 5, lines 3-7.

FORMULA

G.f.: (1-x^2+x^4)*(1-x-x^3+x^4+2*x^5+x^6-x^7-x^9+x^10) / ((1-x)^3*(1-x^2)^4*(1-x^3)^5*(1-x^4)^5).

CROSSREFS

Sequence in context: A089351 A005380 A257557 * A230439 A184697 A124613

Adjacent sequences:  A124609 A124610 A124611 * A124613 A124614 A124615

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 21 2006

STATUS

approved

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Last modified July 19 12:49 EDT 2019. Contains 325159 sequences. (Running on oeis4.)