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A058980 Positive numbers of form 4k such that card(invphi(4*k)=0) (the nontotients congruent to 0 modulo 4). 0
68, 76, 124, 152, 188, 236, 244, 248, 284, 304, 308, 340, 364, 376, 404, 412, 428, 436, 472, 484, 488, 496, 516, 532, 548, 572, 596, 604, 608, 628, 644, 668, 680, 724, 728, 740, 748, 752, 788, 804, 824, 844, 868, 872, 892, 908, 916, 944, 948, 964, 968, 988 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..52.

PROG

(PARI) lista(nn) = {forstep (n=4, nn, 4, if (!istotient(n), print1(n, ", ")); ); } \\ Michel Marcus, May 13 2020

CROSSREFS

Intersection of A005277 (nontotients) and A008586 (multiples of 4).

Sequence in context: A269748 A153831 A306113 * A079703 A281235 A097760

Adjacent sequences:  A058977 A058978 A058979 * A058981 A058982 A058983

KEYWORD

nonn

AUTHOR

Labos Elemer, Jan 15 2001

STATUS

approved

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Last modified June 28 04:00 EDT 2022. Contains 354903 sequences. (Running on oeis4.)