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A095192 Smallest semiprime with same leading digits as n!. 0

%I

%S 10,21,62,247,1202,7201,50401,403201,3628801,36288001,399168002,

%T 4790016001,62270208001,871782912007,130767436800017,209227898880001,

%U 3556874280960001,64023737057280001,12164510040883200031

%N Smallest semiprime with same leading digits as n!.

%t ssp[n_]:=Module[{f=n!,k=0},While[PrimeOmega[10^Max[IntegerLength[k],1] f+k]!=2,k++];10^Max[1,IntegerLength[k]] f+k]; Array[ssp,20] (* _Harvey P. Dale_, May 05 2019 *)

%Y Cf. A068844, A001358.

%K base,nonn

%O 1,1

%A _Jason Earls_, Jun 21 2004

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Last modified June 16 16:09 EDT 2021. Contains 345063 sequences. (Running on oeis4.)