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A364566
Numbers k such that A364557(k) < A000010(k), where A364557 is the Möbius transform of A005941, and A000010 is Euler totient function phi.
2
9, 15, 18, 21, 25, 27, 30, 33, 35, 36, 42, 45, 49, 50, 54, 55, 60, 63, 65, 66, 70, 72, 75, 77, 81, 84, 90, 91, 98, 99, 100, 105, 108, 110, 117, 119, 120, 121, 125, 126, 130, 132, 135, 140, 143, 144, 147, 150, 154, 162, 165, 168, 169, 175, 180, 182, 187, 189, 195, 196, 198, 200, 209, 210, 216, 220, 221, 225, 231
OFFSET
1,1
PROG
(PARI)
A364557(n) = if(1==n, 1, 2^(primepi(vecmax(factor(n)[, 1]))+(bigomega(n)-omega(n))-1));
isA364566(n) = (A364557(n)<eulerphi(n));
CROSSREFS
Positions of negative terms in A364558.
Sequence in context: A105441 A325164 A093642 * A177733 A207675 A118236
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jul 29 2023
STATUS
approved