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A062951 H(A005117(n)) where H(n) is the half-totient function and A005117(n) are the squarefree numbers. 0
1, 2, 1, 3, 2, 5, 6, 3, 4, 8, 9, 6, 5, 11, 6, 14, 4, 15, 10, 8, 12, 18, 9, 12, 20, 6, 21, 11, 23, 16, 26, 20, 18, 14, 29, 30, 15, 24, 10, 33, 22, 12, 35, 36, 18, 30, 12, 39, 20, 41, 32, 21, 28, 44, 36, 30, 23, 36, 48, 50, 16, 51, 24, 26, 53, 54, 20, 36, 56, 18, 44, 29, 48, 30, 40 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

LINKS

Table of n, a(n) for n=3..77.

PROG

(PARI) H(n)=eulerphi(n)/2; j=[]; for(n=3, 200, if(issquarefree(n), j=concat(j, H(n)))); j

CROSSREFS

Cf. A023022, A005117.

Sequence in context: A325193 A079974 A102517 * A263150 A145794 A176741

Adjacent sequences:  A062948 A062949 A062950 * A062952 A062953 A062954

KEYWORD

nonn

AUTHOR

Jason Earls, Jul 21 2001

STATUS

approved

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Last modified August 8 06:27 EDT 2020. Contains 336290 sequences. (Running on oeis4.)