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!)
A067989 Row sums of triangle A067979; also of triangle A067990. 2

%I #3 Mar 31 2012 13:20:07

%S 1,9,34,95,240,553,1212,2547,5195,10340,20184,38766,73451,137565,

%T 255080,468877,855288,1549583,2790510,4997895,8907481,15804634,

%U 27928464,49169100,86268325,150882993,263124862

%N Row sums of triangle A067979; also of triangle A067990.

%F a(n)= (n+2)*((3*n+1)*F(n-1)/2+(2*n+1)*F(n)), with F(n) := A000045(n) (Fibonacci).

%F G.f.: (1+4*x-x^2)*(1+2*x)/(1-x-x^2)^3.

%K nonn,easy

%O 0,2

%A _Wolfdieter Lang_, Feb 15 2002

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 April 24 11:49 EDT 2024. Contains 371936 sequences. (Running on oeis4.)