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A152984 Absolute values of A152864. 1
1, 2, 3, 3, 5, 3, 7, 4, 7, 5, 11, 1, 13, 7, 9, 5, 17, 2, 19, 3, 13, 11, 23, 5, 21, 13, 17, 5, 29, 5, 31, 6, 21, 17, 25, 11, 37, 19, 25, 3, 41, 5, 43, 9, 17, 23, 47, 19, 43, 12, 33, 11, 53, 5, 41, 1, 37, 29, 59, 37, 61, 31, 27, 7, 49, 5, 67, 15, 45, 3, 71, 40, 73, 37, 31, 17, 61, 5, 79, 17 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..80.

MAPLE

A152864 := proc(n) 2*n-numtheory[sigma](n)+numtheory[tau](n)-1 ; end: A152984 := proc(n) abs(A152864(n)) ; end: for n from 1 to 120 do printf("%d, ", A152984(n)) ; od: # R. J. Mathar, Jan 22 2009

CROSSREFS

Cf. A152864.

Sequence in context: A066858 A333496 A152864 * A177980 A215405 A064921

Adjacent sequences:  A152981 A152982 A152983 * A152985 A152986 A152987

KEYWORD

nonn

AUTHOR

Omar E. Pol, Dec 19 2008

EXTENSIONS

Few more terms from R. J. Mathar, Jan 22 2009

STATUS

approved

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Last modified June 23 12:05 EDT 2021. Contains 345401 sequences. (Running on oeis4.)