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A336318
Square root of the largest square dividing n*d(n), where d(n) is the number of divisors of n, A000005.
2
1, 2, 1, 2, 1, 2, 1, 4, 3, 2, 1, 6, 1, 2, 2, 4, 1, 6, 1, 2, 2, 2, 1, 8, 5, 2, 6, 2, 1, 4, 1, 8, 2, 2, 2, 18, 1, 2, 2, 8, 1, 4, 1, 2, 3, 2, 1, 4, 7, 10, 2, 2, 1, 12, 2, 8, 2, 2, 1, 12, 1, 2, 3, 8, 2, 4, 1, 2, 2, 4, 1, 12, 1, 2, 15, 2, 2, 4, 1, 20, 9, 2, 1, 12, 2, 2, 2, 8, 1, 6
OFFSET
1,2
FORMULA
a(n) = A000188(A038040(n)) = A000188(n*A000005(n)).
a(n) = A000196(A038040(n)/A336319(n)).
PROG
(PARI)
A000188(n) = core(n, 1)[2]; \\ From A000188
A336318(n) = A000188(n*numdiv(n));
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jul 19 2020
STATUS
approved