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A037228 phi(n) - pi(n). 14
1, 0, 0, 0, 1, -1, 2, 0, 2, 0, 5, -1, 6, 0, 2, 2, 9, -1, 10, 0, 4, 2, 13, -1, 11, 3, 9, 3, 18, -2, 19, 5, 9, 5, 13, 1, 24, 6, 12, 4, 27, -1, 28, 6, 10, 8, 31, 1, 27, 5, 17, 9, 36, 2, 24, 8, 20, 12, 41, -1, 42, 12, 18, 14, 30, 2, 47, 13, 25, 5, 50, 4, 51, 15, 19, 15, 39, 3, 56, 10, 32, 18, 59, 1, 41, 19 (list; graph; refs; listen; history; internal format)
OFFSET

1,7

COMMENTS

It is known that a(n) >= 0 for n >= 61.

REFERENCES

D. S. Mitrinovic et al., Handbook of Number Theory, Kluwer, p. 11.

LINKS

T. D. Noe, Table of n, a(n) for n=1..1000

CROSSREFS

Cf. A037171, A037229.

Sequence in context: A079200 A011420 A035686 * A002117 A042970 A158327

Adjacent sequences:  A037225 A037226 A037227 * A037229 A037230 A037231

KEYWORD

sign

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 17 14:50 EST 2012. Contains 206050 sequences.