login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A027164 a(n) = T(n,0) + T(n,1) + ... + T(n,n), T given by A027157. 1
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 (list; graph; refs; listen; history; text; internal format)
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

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 27 17:42 EST 2023. Contains 359845 sequences. (Running on oeis4.)