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A364565
Numbers k at which point A364557 (the Möbius transform of A005941) is equal to A000010 (Euler phi function).
4
1, 2, 3, 4, 5, 6, 8, 10, 12, 16, 20, 24, 32, 40, 48, 64, 80, 85, 96, 128, 160, 170, 192, 256, 320, 340, 384, 512, 640, 680, 768, 1024, 1280, 1360, 1536, 2048, 2560, 2720, 3072, 4096, 5120, 5440, 6144, 8192, 10240, 10880, 12288, 16384, 20480, 21760, 24576, 32768, 40960, 43520, 49152, 65536, 81920, 87040, 98304, 131072
OFFSET
1,2
COMMENTS
Question: Are there any other odd terms apart from 1, 3, 5, 85?
PROG
(PARI)
A364557(n) = if(1==n, 1, 2^(primepi(vecmax(factor(n)[, 1]))+(bigomega(n)-omega(n))-1));
isA364565(n) = (A364557(n)==eulerphi(n));
CROSSREFS
Positions of 0's in A364558.
Sequence in context: A362127 A364960 A245709 * A364548 A364544 A253789
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jul 29 2023
STATUS
approved