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A328110 Fixed points of A327860: numbers n for which A003415(A276086(n)) = n. 3
0, 1, 7, 8, 2556 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Applying A276086 to these terms gives the fixed points of A327859: 1, 2, 10, 15, 5005, ...

No more terms below <= 2550136832.

LINKS

Table of n, a(n) for n=1..5.

PROG

(PARI)

A327860(n) = { my(m=1, i=0, s=0, pr=1, nextpr); while((n>0), i=i+1; nextpr = prime(i)*pr; if((n%nextpr), my(e=((n%nextpr)/pr)); m *= (prime(i)^e); s += (e / prime(i)); n-=(n%nextpr)); pr=nextpr); (s*m); };

isA328110(n) = (A327860(n) == n);

CROSSREFS

Cf. A002110, A002620, A003415, A276086, A327859, A327860.

After two initial terms (0 & 1), a subsequence of A328118.

Sequence in context: A042499 A156206 A226487 * A298740 A202283 A322092

Adjacent sequences:  A328107 A328108 A328109 * A328111 A328112 A328113

KEYWORD

nonn,more

AUTHOR

Antti Karttunen, Oct 08 2019

STATUS

approved

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Last modified November 18 14:59 EST 2019. Contains 329262 sequences. (Running on oeis4.)