A099206 Expansion of x^2*(2*x^11+2*x^9+2*x^8+x^7+2*x^6+x^5+x^4+x^3-x^2-x-1) / (x^9+x^6+2*x^3-1).

0, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 6, 2, 6, 15, 6, 15, 38, 15, 38, 97, 38, 97, 247, 97, 247, 629, 247, 629, 1602, 629, 1602, 4080, 1602, 4080, 10391, 4080, 10391, 26464, 10391, 26464, 67399, 26464, 67399, 171653, 67399, 171653, 437169, 171653, 437169

Offset

1,9

Comments

Variant of three copies of A109545. - R. J. Mathar, Jul 10 2012

Links

Table of n, a(n) for n=1..50.

Stewart R. Hinsley, A Tile Associated with the 8th Unit Cubic Pisot Number [Broken link?]

Richard Kenyon, The Construction of Self-Similar Tilings, arXiv:math.MG/9505210

Mathematica

CoefficientList[Series[x^2*(2*x^11 + 2*x^9 + 2*x^8 + x^7 + 2*x^6 + x^5 + x^4 + x^3 - x^2 - x - 1)/(x^9 + x^6 + 2*x^3 - 1), {x, 0, 100}], x]

Crossrefs

Sequence in context: A050977 A053448 A060550 * A269223 A121341 A378681

Adjacent sequences: A099203 A099204 A099205 * A099207 A099208 A099209

Keyword

nonn,easy

Author

Roger L. Bagula, Mar 19 2005

Extensions

Better name from Colin Barker, Dec 26 2012

Status

approved