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!)
A262291 a(n) = Sum_k k!*A262292(n,k). 1
0, 24, 330, 5382, 98250 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..6.

P. J. Cameron, M. Gadouleau, J. D. Mitchell, Y. Peresse, Chains of subsemigroups, arXiv preprint arXiv:1501.06394 [math.GR], 2015. See Table 1.

CROSSREFS

Cf. A262292.

Sequence in context: A295250 A295649 A188779 * A267838 A045543 A125459

Adjacent sequences:  A262288 A262289 A262290 * A262292 A262293 A262294

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Sep 21 2015

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 January 28 13:34 EST 2022. Contains 350656 sequences. (Running on oeis4.)