A027164 a(n) = T(n,0) + T(n,1) + ... + T(n,n), T given by A027157.

1, 3, 10, 22, 67, 145, 436, 940, 2821, 6079, 18238, 39298, 117895, 254029, 762088, 1642072, 4926217, 10614523, 31843570, 68613358, 205840075, 443523721, 1330571164, 2866982404, 8600947213, 18532465591, 55597396774

Offset

0,2

Links

Table of n, a(n) for n=0..26.

Formula

G.f.: x(x^2+2x+1)/[(1-x)(1-6x^2-3x^4)].

Mathematica

CoefficientList[Series[(1+2x+x^2)/(1-x-6x^2+6x^3-3x^4 + 3x^5), {x, 0, 30}], x]  (* Harvey P. Dale, Mar 20 2011 *)

Crossrefs

Sequence in context: A070880 A321335 A171686 * A292921 A270470 A166119

Adjacent sequences: A027161 A027162 A027163 * A027165 A027166 A027167

Keyword

nonn

Author

Clark Kimberling

Status

approved