A145283 a(n) = number of monomials in n-th power of polynomial x^3-x-1.

3, 6, 9, 11, 14, 18, 21, 23, 27, 30, 33, 36, 39, 42, 43, 48, 51, 54, 57, 60, 63, 66, 69, 72, 75, 78, 81, 84, 87, 90, 93, 96, 99, 101, 105, 108, 111, 114, 117, 120, 123, 126, 129, 132, 135, 138, 141, 144, 147, 150, 153, 156, 159, 162, 165, 168, 171, 174, 177, 180, 183

Offset

1,1

Comments

a(n)=Length[(x^3-x-1)^n]

Links

Table of n, a(n) for n=1..61.

Mathematica

a = {}; k = x^3 - x - 1; m = k; Do[AppendTo[a, Length[m]]; m = Expand[m*k], {n, 1, 100}]; a (*Artur Jasinski*)

Crossrefs

Sequence in context: A265035 A151926 A166265 * A298792 A177800 A310147

Adjacent sequences: A145280 A145281 A145282 * A145284 A145285 A145286

Keyword

nonn

Author

Artur Jasinski, Oct 06 2008

Status

approved