login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A192565 a(n) = sum(abs(stirling1(n+1,k+1))*stirling2(n,k)*k!^2,k=0..n). 0
1, 1, 7, 119, 3766, 191074, 14190940, 1451180016, 195500153984, 33556323694176, 7148802130010784, 1850863101948856368, 572367322411341168960, 208372437783910651168800, 88211625475147231105812096, 42967145403522500557662391104 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..15.

MATHEMATICA

Table[Sum[Abs[StirlingS1[n+1, k+1]]StirlingS2[n, k]k!^2, {k, 0, n}], {n, 0, 100}]

PROG

(Maxima) makelist(sum(abs(stirling1(n+1, k+1))*stirling2(n, k)*k!^2, k, 0, n), n, 0, 24);

CROSSREFS

Sequence in context: A268300 A304917 A113667 * A171209 A296731 A092612

Adjacent sequences:  A192562 A192563 A192564 * A192566 A192567 A192568

KEYWORD

nonn

AUTHOR

Emanuele Munarini, Jul 04 2011

STATUS

approved

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 October 18 22:24 EDT 2019. Contains 328211 sequences. (Running on oeis4.)