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A062950 C(H(n)), where C(n) is Chowla's function (A048050) and H(n) is the half-totient function (A023022). 1
-1, -1, 0, -1, 0, 0, 0, 0, 0, 0, 5, 0, 2, 2, 6, 0, 3, 2, 5, 0, 0, 2, 7, 5, 3, 5, 9, 2, 8, 6, 7, 6, 15, 5, 20, 3, 15, 6, 21, 5, 10, 7, 15, 0, 0, 6, 10, 7, 14, 15, 15, 3, 21, 15, 20, 9, 0, 6, 41, 8, 20, 14, 35, 7, 14, 14, 13, 15, 12, 15, 54, 20, 21, 20, 41, 15, 16, 14, 12, 21, 0, 15, 30, 10, 27, 21, 39, 15, 54, 13, 41, 0, 54, 14, 75, 10, 41, 21, 42, 14 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,11

LINKS

Table of n, a(n) for n=3..102.

PROG

(PARI) C(n)=sigma(n)-n-1; H(n)=eulerphi(n)/2; j=[]; for(n=3, 150, j=concat(j, C(H(n)))); j

CROSSREFS

Cf. A048050, A023022.

Sequence in context: A200418 A200637 A318137 * A172035 A019625 A261165

Adjacent sequences:  A062947 A062948 A062949 * A062951 A062952 A062953

KEYWORD

sign

AUTHOR

Jason Earls, Jul 21 2001

STATUS

approved

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Last modified August 10 16:56 EDT 2020. Contains 336381 sequences. (Running on oeis4.)