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A324577
a(n) = A025487(n) * A324576(n) = A025487(n) * A276086(A025487(n)).
6
2, 6, 36, 30, 120, 300, 3600, 15000, 210, 672, 1260, 42000, 2940, 28224, 88200, 164640, 288120, 4609920, 216090000, 21176820, 564715200, 2310, 11880, 18480, 4435200, 19404000, 66555720, 44370480000, 50820, 1306800, 2845920, 63748608, 5856903360, 328703760, 306790176000, 12298440, 7906140000, 645668100, 33746919360, 15874550866944
OFFSET
1,1
COMMENTS
Note that A324198(A025487(n)) = gcd(A025487(n), A324576(n)) = 1 for all n, because each term of A025487 is a product of primorials.
FORMULA
a(n) = A025487(n) * A324576(n) = A025487(n) * A276086(A025487(n)).
a(n) = A324580(A025487(n)).
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; };
CROSSREFS
Cf. also A324582 (a subsequence).
Sequence in context: A173399 A193190 A247209 * A324582 A275600 A226368
KEYWORD
nonn
AUTHOR
Antti Karttunen, Mar 09 2019
STATUS
approved