A324578 - OEIS

A324578

Numbers n for which n*A276086(n) is a term of A055932.

1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 44, 45, 48, 50, 54, 56, 60, 66, 70, 72, 75, 77, 80, 81, 84, 88, 90, 96, 98, 99, 100, 105, 108, 110, 112, 120, 125, 126, 128, 132, 135, 140, 143, 144, 147, 150, 160, 162, 165, 168, 176, 180, 189, 192, 196, 198, 200, 210, 224, 231, 240, 245, 250, 252, 256

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OFFSET

1,2

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..10000

Index entries for sequences related to primorial base

Index entries for sequences related to primorial numbers

PROG

(PARI)

A276086(n) = { my(i=0, m=1, pr=1, nextpr); while((n>0), i=i+1; nextpr = prime(i)*pr; if((n%nextpr), m*=(prime(i)^((n%nextpr)/pr)); n-=(n%nextpr)); pr=nextpr); m; };

A324580(n) = n*A276086(n);

isA055932(n) = if(1==n, 1, my(f=factor(n)); (primepi(f[#f~, 1]) == #f~));

isA324578(n) = isA055932(A324580(n));

CROSSREFS

Cf. A002110, A055932, A276086, A324579 (a subsequence), A324580.

Sequence in context: A225733 A225732 A295585 * A373847 A193988 A124455

Adjacent sequences: A324575 A324576 A324577 * A324579 A324580 A324581

KEYWORD

nonn

AUTHOR

Antti Karttunen, Mar 09 2019

STATUS

approved