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A072106 All nontotients [even and odd] in reduced residue system of n. 0
0, 0, 0, 1, 1, 1, 2, 3, 2, 3, 4, 3, 5, 5, 4, 7, 8, 5, 9, 7, 5, 9, 11, 7, 10, 11, 10, 11, 15, 7, 16, 15, 11, 15, 13, 11, 20, 17, 14, 15, 23, 11, 24, 19, 15, 21, 26, 15, 23, 19, 19, 23, 30, 17, 23, 23, 21, 27, 33, 15, 34, 29, 22, 31, 27, 19, 38, 31, 28, 23, 41, 23, 42, 35, 26, 35, 37 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

LINKS

Table of n, a(n) for n=1..77.

EXAMPLE

n=113: reduced residue system consists of 112 numbers: Card[OddNonTotients(113)]=56-1, EvenNonTotients={14,26,34,38,50,62,68,74,76,86,90,94,98}, i.e. 13 terms, therefore a(113)=56-1+13=68=a(113).

CROSSREFS

Cf. A000010, A037225, A072451-A072457, A005277, A002202.

Sequence in context: A111439 A020986 A095161 * A124524 A303543 A124525

Adjacent sequences:  A072103 A072104 A072105 * A072107 A072108 A072109

KEYWORD

nonn

AUTHOR

Labos Elemer, Jun 19 2002

STATUS

approved

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Last modified April 22 14:13 EDT 2019. Contains 322349 sequences. (Running on oeis4.)