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A326186 a(n) = n - A057521(n), where A057521 gives the powerful part of n. 2
0, 1, 2, 0, 4, 5, 6, 0, 0, 9, 10, 8, 12, 13, 14, 0, 16, 9, 18, 16, 20, 21, 22, 16, 0, 25, 0, 24, 28, 29, 30, 0, 32, 33, 34, 0, 36, 37, 38, 32, 40, 41, 42, 40, 36, 45, 46, 32, 0, 25, 50, 48, 52, 27, 54, 48, 56, 57, 58, 56, 60, 61, 54, 0, 64, 65, 66, 64, 68, 69, 70, 0, 72, 73, 50, 72, 76, 77, 78, 64, 0, 81, 82, 80, 84 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..20000

FORMULA

a(n) = n - A057521(n).

PROG

(PARI)

A057521(n) = { my(f=factor(n)); prod(i=1, #f~, if(f[i, 2]>1, f[i, 1]^f[i, 2], 1)); }; \\ From A057521.

A326186(n) = (n-A057521(n));

CROSSREFS

Cf. A057521, A326185.

Cf. also A010848.

Sequence in context: A004482 A329233 A111677 * A326055 A276331 A049271

Adjacent sequences:  A326183 A326184 A326185 * A326187 A326188 A326189

KEYWORD

nonn

AUTHOR

Antti Karttunen, Jul 11 2019

STATUS

approved

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Last modified November 20 10:09 EST 2019. Contains 329334 sequences. (Running on oeis4.)