A122645 - OEIS

A122645

a(n) = phi(n)_phi(n) where phi() = A000010.

1, 1, 2, 2, 4, 2, 6, 4, 6, 4, 10, 4, 14, 6, 8, 8, 22, 6, 26, 8, 14, 10, 46, 8, 40, 14, 26, 14, 64, 8, 90, 22, 40, 22, 52, 14, 114, 26, 52, 22, 160, 14, 170, 40, 52, 46, 190, 22, 170, 40, 98, 52, 262, 26, 160, 52, 114, 64, 298, 22, 360, 90, 114, 98, 200, 40, 402, 98, 180, 52, 490

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,3

COMMENTS

See A122618 for notation.

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = A122618(A000010(n)). - Antti Karttunen, Dec 05 2017

MAPLE

a:= n-> (b-> (l-> add(l[i]*b^(i-1), i=1..nops(l)))(

convert(b, base, 10)))(numtheory[phi](n)):