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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A092983 Least squarefree number > n!. 1
2, 3, 7, 26, 122, 721, 5042, 40321, 362881, 3628801, 39916801, 479001602, 6227020801, 87178291201, 1307674368001, 20922789888001, 355687428096001, 6402373705728001, 121645100408832001, 2432902008176640001 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..20.

EXAMPLE

a(5) = 122 as 121 is not squarefree.

MATHEMATICA

lsf[n_]:=Module[{i=1}, While[!SquareFreeQ[n+i], i++]; n+i]; lsf/@(Range[20]!)  (* Harvey P. Dale, Apr 06 2011 *)

PROG

(PARI) a(n)=for(i=n!+1, n!+n, if(issquarefree(i), return(i)))

CROSSREFS

Cf. A092984.

Sequence in context: A301519 A274692 A308114 * A089708 A107881 A128001

Adjacent sequences:  A092980 A092981 A092982 * A092984 A092985 A092986

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Mar 28 2004

EXTENSIONS

Corrected and extended by Mohammed Bouayoun (bouyao(AT)wanadoo.fr), Mar 29 2004

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 June 15 20:50 EDT 2019. Contains 324145 sequences. (Running on oeis4.)