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A057111 Numbers n which are a factor of (LPP(n)-1)!, where LPP(n) is the largest prime power factor of n. 1

%I #5 Mar 31 2012 10:30:31

%S 8,9,16,18,24,25,27,32,36,40,45,48,49,50,54,56,63,64,72,75,80,81,90,

%T 96,98,100,108,112,120,121,125,126,128,135,144,147,150,160,162,168,

%U 169,175,176,180,189,192,196,200,208,216,224,225,240,242,243,245,250,252

%N Numbers n which are a factor of (LPP(n)-1)!, where LPP(n) is the largest prime power factor of n.

%e 18 is in the sequence since 9 is the largest prime power factor of 18 and 18 is a factor of (9-1)!=8!=40320=18*2240.

%Y Cf. A002034, A034699, A057109, A057110. Distinct from A046790 although similar initial terms.

%K easy,nonn

%O 1,1

%A _Henry Bottomley_, Aug 08 2000

%E More terms from _James A. Sellers_, Aug 22 2000

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Last modified July 8 09:01 EDT 2024. Contains 374153 sequences. (Running on oeis4.)