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A015783 Phi(n) + 4 | sigma(n + 4). 4
6, 10, 20, 22, 34, 35, 50, 51, 56, 58, 66, 72, 82, 116, 118, 142, 195, 200, 202, 214, 220, 274, 298, 330, 340, 358, 382, 394, 454, 478, 538, 562, 622, 642, 668, 680, 694, 838, 862, 922, 940, 1042, 1056, 1138, 1198, 1234, 1272, 1282, 1295, 1318 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..50.

PROG

(PARI) is(n)=!(sigma(n+4)%(eulerphi(n)+4)) \\ Charles R Greathouse IV, Sep 25 2012

CROSSREFS

Sequence in context: A327410 A145351 A227874 * A300020 A068017 A270544

Adjacent sequences:  A015780 A015781 A015782 * A015784 A015785 A015786

KEYWORD

nonn

AUTHOR

Robert G. Wilson v

EXTENSIONS

Corrected by Charles R Greathouse IV, Sep 25 2012

STATUS

approved

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Last modified March 4 08:38 EST 2021. Contains 341781 sequences. (Running on oeis4.)