A351577 - OEIS

A351577

a(n) = A003557(A276076(n)).

1, 1, 1, 1, 3, 3, 1, 1, 1, 1, 3, 3, 5, 5, 5, 5, 15, 15, 25, 25, 25, 25, 75, 75, 1, 1, 1, 1, 3, 3, 1, 1, 1, 1, 3, 3, 5, 5, 5, 5, 15, 15, 25, 25, 25, 25, 75, 75, 7, 7, 7, 7, 21, 21, 7, 7, 7, 7, 21, 21, 35, 35, 35, 35, 105, 105, 175, 175, 175, 175, 525, 525, 49, 49, 49, 49, 147, 147, 49, 49, 49, 49, 147, 147, 245

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OFFSET

0,5

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..10080

Index entries for sequences related to factorial base representation

FORMULA

a(n) = A003557(A276076(n)).

a(n) = A276076(A276009(n)).

a(n) = A328572(A351576(n)).

a(n) = A085731(A276076(n)) = gcd(A276076(n), A351950(n)).

PROG

(PARI)

A003557(n) = (n/factorback(factorint(n)[, 1]));

A276076(n) = { my(i=0, m=1, f=1, nextf); while((n>0), i=i+1; nextf = (i+1)*f; if((n%nextf), m*=(prime(i)^((n%nextf)/f)); n-=(n%nextf)); f=nextf); m; };

A351577(n) = A003557(A276076(n));

CROSSREFS

Cf. A003557, A085731, A276009, A276076, A328572, A351576, A351950, A351952.

Sequence in context: A326057 A130778 A353516 * A328572 A016554 A046533

Adjacent sequences: A351574 A351575 A351576 * A351578 A351579 A351580

KEYWORD

nonn,base,look

AUTHOR

Antti Karttunen, Apr 01 2022

STATUS

approved