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A124616 Poincaré series [or Poincare series] P(T_{4,2}; x). 0
1, 4, 14, 42, 113, 278, 646, 1418, 2979, 6018, 11752, 22256, 41030, 73784, 129748, 223498, 377753, 627314, 1024882, 1649026, 2615695, 4093814, 6327054, 9663096, 14593624, 21807176, 32260234, 47270090, 68637409, 98804814, 141063230, 199815646, 280916288 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..32.

Dragomir Z. Djokovic, Poincaré series [or Poincare series] of some pure and mixed trace algebras of two generic matrices. See Table 4.

FORMULA

G.f.: (1-x+x^3+x^5-x^7+x^8)/((1-x)^5*(1-x^2)^4*(1-x^3)^5*(1-x^4)^3).

CROSSREFS

Sequence in context: A219867 A295201 A309296 * A335514 A221058 A124617

Adjacent sequences:  A124613 A124614 A124615 * A124617 A124618 A124619

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 21 2006

STATUS

approved

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Last modified June 13 20:25 EDT 2021. Contains 345009 sequences. (Running on oeis4.)