The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A078487 G.f.: (1-9*x+29*x^2-30*x^3+10*x^4-x^5-(1-6*x+x^2)^(1/2)*(1-6*x+13*x^2-7*x^3+x^4))/(2*x). 1
 0, 1, 2, 6, 23, 100, 464, 2236, 11048, 55588, 283648, 1463868, 7626296, 40049188, 211768752, 1126513788, 6024316488, 32368294756, 174645900768, 945893037948, 5140619493464, 28024941448420, 153219244012432, 839884005112636, 4615012956649832, 25415266785076900 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS Generating function for a certain wreath product. LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..1000 M. D. Atkinson and T. Stitt, Restricted permutations and the wreath product, Preprint, 2002. M. D. Atkinson and T. Stitt, Restricted permutations and the wreath product, Discrete Math., 259 (2002), 19-36. MATHEMATICA CoefficientList[Series[(1 - 9 x + 29 x^2 - 30 x^3 + 10 x^4 - x^5 - (1 - 6 x + x^2)^(1/2) (1 - 6 x + 13 x^2 - 7 x^3 + x^4))/(2 x), {x, 0, 33}], x] (* Vincenzo Librandi, May 28 2016 *) CROSSREFS Sequence in context: A009449 A233106 A133656 * A193038 A213090 A218225 Adjacent sequences:  A078484 A078485 A078486 * A078488 A078489 A078490 KEYWORD nonn AUTHOR N. J. A. Sloane, Jan 04 2003 EXTENSIONS Replaced definition with g.f. given by Atkinson and Still (2002). - N. J. A. Sloane, May 24 2016 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 4 05:02 EDT 2021. Contains 346442 sequences. (Running on oeis4.)