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!)
A320821 Number of partitions of n with exactly eight sorts of part 1 which are introduced in ascending order. 2

%I #4 Oct 21 2018 12:44:08

%S 1,36,751,11917,159815,1912316,21084803,218711887,2164920950,

%T 20657703246,191440769945,1732792167043,15385193971985,

%U 134455882817716,1159708265019855,9893526482067374,83627808435796896,701411197245083482,5844301347854288709,48423747013469923303

%N Number of partitions of n with exactly eight sorts of part 1 which are introduced in ascending order.

%H Alois P. Heinz, <a href="/A320821/b320821.txt">Table of n, a(n) for n = 8..1112</a>

%F a(n) = A320739(n) - A320738(n).

%p b:= proc(n, i, k) option remember; `if`(n=0 or i<2, add(

%p Stirling2(n, j), j=0..k), add(b(n-i*j, i-1, k), j=0..n/i))

%p end:

%p a:= n-> (k-> b(n$2, k)-b(n$2, k-1))(8):

%p seq(a(n), n=8..35);

%Y Column k=8 of A292746.

%Y Cf. A320738, A320739.

%K nonn

%O 8,2

%A _Alois P. Heinz_, Oct 21 2018

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 May 4 11:41 EDT 2024. Contains 372240 sequences. (Running on oeis4.)