login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A166999 a(n) = a(n-1) + a(n-1)^2 + a(n-1)^3 for n>0 with a(0)=1. 1

%I

%S 1,3,39,60879,225636660844959,

%T 11487591726386681145142587842614325062822719

%N a(n) = a(n-1) + a(n-1)^2 + a(n-1)^3 for n>0 with a(0)=1.

%F Row sums of triangle A166880, which lists the coefficients in the iterations of x+x^2+x^3.

%o (PARI) a(n)=if(n==0,1,a(n-1)+a(n-1)^2+a(n-1)^3)

%Y Cf. A166880.

%K nonn

%O 0,2

%A _Paul D. Hanna_, Nov 21 2009

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 19 03:38 EDT 2021. Contains 345125 sequences. (Running on oeis4.)