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 A079390 spf(n) * spf(n+1) * spf(n+2), where spf=A020639 (smallest prime factor). 1

%I

%S 6,12,30,20,70,28,42,12,66,44,286,52,78,12,102,68,646,76,114,12,138,

%T 92,230,20,30,12,174,116,1798,124,186,12,30,20,370,148,222,12,246,164,

%U 3526,172,258,12,282,188,658,28,42,12,318,212,530,20,30,12,354,236,7198,244

%N spf(n) * spf(n+1) * spf(n+2), where spf=A020639 (smallest prime factor).

%C For n>2, a(n) is a record value iff (n,n+2) is a twin prime pair (conjecture).

%H Harvey P. Dale, <a href="/A079390/b079390.txt">Table of n, a(n) for n = 1..1000</a>

%t Times@@@Partition[Table[FactorInteger[n][[1,1]],{n,70}],3,1] (* _Harvey P. Dale_, Oct 06 2015 *)

%Y Cf. A001359, A006512, A014574.

%K nonn

%O 1,1

%A _Reinhard Zumkeller_, Feb 20 2003

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Last modified January 22 03:32 EST 2021. Contains 340360 sequences. (Running on oeis4.)