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A082515 a(n)=A000720(n)+A000010(n). 1
1, 2, 4, 4, 7, 5, 10, 8, 10, 8, 15, 9, 18, 12, 14, 14, 23, 13, 26, 16, 20, 18, 31, 17, 29, 21, 27, 21, 38, 18, 41, 27, 31, 27, 35, 23, 48, 30, 36, 28, 53, 25, 56, 34, 38, 36, 61, 31, 57, 35, 47, 39, 68, 34, 56, 40, 52, 44, 75, 33, 78, 48, 54, 50, 66, 38, 85, 51, 63, 43, 90, 44 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..72.

MATHEMATICA

Table[EulerPhi[w]+PrimePi[w], {w, 1, 128}]

CROSSREFS

Cf. A000010, A000005, A000720, A073757, A037228, A063070, A045763.

Sequence in context: A177153 A164719 A104510 * A062855 A274593 A103622

Adjacent sequences:  A082512 A082513 A082514 * A082516 A082517 A082518

KEYWORD

easy,nonn

AUTHOR

Labos Elemer, Apr 29 2003

STATUS

approved

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Last modified May 20 01:04 EDT 2022. Contains 353847 sequences. (Running on oeis4.)