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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
8, 9, 16, 18, 24, 25, 27, 32, 36, 40, 45, 48, 49, 50, 54, 56, 63, 64, 72, 75, 80, 81, 90, 96, 98, 100, 108, 112, 120, 121, 125, 126, 128, 135, 144, 147, 150, 160, 162, 168, 169, 175, 176, 180, 189, 192, 196, 200, 208, 216, 224, 225, 240, 242, 243, 245, 250, 252 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..58.

EXAMPLE

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.

CROSSREFS

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

Sequence in context: A037371 A236300 A046790 * A171425 A143720 A231016

Adjacent sequences:  A057108 A057109 A057110 * A057112 A057113 A057114

KEYWORD

easy,nonn

AUTHOR

Henry Bottomley, Aug 08 2000

EXTENSIONS

More terms from James A. Sellers, Aug 22 2000

STATUS

approved

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Last modified August 23 11:24 EDT 2019. Contains 326222 sequences. (Running on oeis4.)