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!)
A353164 Expansion of 1/(1 - Sum_{p prime} p * x^p). 2

%I #15 Apr 28 2022 13:36:11

%S 1,0,2,3,4,17,17,63,100,211,495,846,2057,3831,8181,17078,33788,72705,

%T 144801,303452,623115,1274365,2652052,5408046,11207927,23020231,

%U 47378495,97774736,200819019,414365805,852285510,1755453858,3616014678,7441523271,15332278869

%N Expansion of 1/(1 - Sum_{p prime} p * x^p).

%F a(0) = 1; a(n) = Sum_{p<=n, p prime} p * a(n-p).

%o (PARI) my(N=40, x='x+O('x^N)); Vec(1/(1-sum(k=1, N, isprime(k)*k*x^k)))

%o (PARI) a(n) = if(n==0, 1, sum(k=1, n, isprime(k)*k*a(n-k)));

%Y Cf. A000040, A023360, A088305, A353162, A353165.

%K nonn

%O 0,3

%A _Seiichi Manyama_, Apr 28 2022

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 July 16 19:40 EDT 2024. Contains 374358 sequences. (Running on oeis4.)