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A328310 a(n) = A051903(A003415(n)) - A051903(n). 8
-1, -1, 0, -1, 0, -1, -1, -1, 0, -1, 2, -1, 1, 2, 1, -1, -1, -1, 1, 0, 0, -1, -1, -1, 0, 0, 3, -1, 0, -1, -1, 0, 0, 1, 0, -1, 0, 3, -1, -1, 0, -1, 2, -1, 1, -1, 0, -1, 0, 1, 1, -1, 1, 3, -1, 0, 0, -1, 0, -1, 0, -1, 0, 1, 0, -1, 1, 0, 0, -1, -1, -1, 0, -1, 2, 1, 0, -1, 0, -1, 0, -1, 0, 0, 1, 4, -1, -1, -1, 1, 3, 0, 1, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,11

LINKS

Antti Karttunen, Table of n, a(n) for n = 2..20000

FORMULA

a(n) = A051903(A003415(n)) - A051903(n).

a(n) = A328311(n) - 1.

PROG

(PARI)

A003415(n) = if(n<=1, 0, my(f=factor(n)); n*sum(i=1, #f~, f[i, 2]/f[i, 1]));

A051903(n) = if((1==n), 0, vecmax(factor(n)[, 2]));

A328310(n) = (A051903(A003415(n)) - A051903(n));

CROSSREFS

Cf. A003415, A051903, A328320, A328321.

One less than A328311.

Sequence in context: A176047 A067461 A321765 * A136673 A283149 A097588

Adjacent sequences:  A328307 A328308 A328309 * A328311 A328312 A328313

KEYWORD

sign

AUTHOR

Antti Karttunen, Oct 13 2019

STATUS

approved

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Last modified January 25 23:08 EST 2020. Contains 331270 sequences. (Running on oeis4.)