A092983 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A092983

Least squarefree number > n!.

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: A274692 A342155 A308114 * A089708 A107881 A371161

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