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!)
A364987 E.g.f. satisfies A(x) = 1 + x*exp(x)*A(x)^4. 6

%I #12 Aug 15 2023 12:01:33

%S 1,1,10,183,5140,196005,9468486,554425963,38171336680,3022130473065,

%T 270537702834250,27021535857472431,2979254055371578524,

%U 359411244032212931533,47093111659782104431438,6660135357832421444841555,1011181346455643980818939856

%N E.g.f. satisfies A(x) = 1 + x*exp(x)*A(x)^4.

%F a(n) = n! * Sum_{k=0..n} k^(n-k) * binomial(4*k+1,k)/( (4*k+1)*(n-k)! ) = n! * Sum_{k=0..n} k^(n-k) * A002293(k)/(n-k)!.

%o (PARI) a(n) = n!*sum(k=0, n, k^(n-k)*binomial(4*k, k)/((3*k+1)*(n-k)!));

%Y Cf. A006153, A295238, A364983.

%Y Cf. A002293, A349331.

%K nonn

%O 0,3

%A _Seiichi Manyama_, Aug 15 2023

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 August 8 17:42 EDT 2024. Contains 375023 sequences. (Running on oeis4.)