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!)
A227935 G.f.: Sum_{n>=0} x^n / (1-x)^(n^5). 3

%I #6 Oct 06 2013 14:42:33

%S 1,1,2,34,773,36656,3001377,333647780,58561139773,13838291852092,

%T 4280413527001849,1779704699369214238,931039792575220097699,

%U 604786686422678514970170,489307443863919174036440087,478922652139578822529676247092,560120417434857039499787289137249

%N G.f.: Sum_{n>=0} x^n / (1-x)^(n^5).

%F a(n) = Sum_{k=0..n} binomial(k^5 + n-k-1, n-k).

%e G.f.: A(x) = 1 + x + 2*x^2 + 34*x^3 + 773*x^4 + 36656*x^5 + 3001377*x^6 +...

%e where

%e A(x) = 1 + x/(1-x) + x^2/(1-x)^32 + x^3/(1-x)^243 + x^4/(1-x)^1024 + x^5/(1-x)^3125 + x^6/(1-x)^7776 +...

%o (PARI) {a(n)=polcoeff(sum(k=0,n,x^k/(1-x+x*O(x^n))^(k^5)),n)}

%o for(n=0,20,print1(a(n),", "))

%o (PARI) {a(n)=sum(k=0,n,binomial(k^5+n-k-1, n-k))}

%o for(n=0,20,print1(a(n),", "))

%Y Cf. A178325, A230050, A227934.

%K nonn

%O 0,3

%A _Paul D. Hanna_, Oct 06 2013

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 19 12:14 EDT 2024. Contains 371792 sequences. (Running on oeis4.)