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A374221
Indices of 1's in A374200, where A374200 is the minimum value of A347381 that it obtains among unitary divisors of n larger than 1.
2
3, 4, 5, 12, 15, 20, 21, 24, 33, 35, 36, 39, 40, 44, 45, 48, 51, 52, 55, 57, 60, 65, 68, 69, 75, 76, 80, 85, 87, 92, 93, 95, 96, 100, 105, 108, 111, 115, 116, 120, 123, 124, 129, 132, 135, 141, 145, 147, 148, 155, 156, 159, 160, 164, 165, 168, 172, 177, 180, 183, 185, 188, 189, 192, 195, 196, 201, 204, 205, 212, 213
OFFSET
1,1
COMMENTS
It seems that for all odd terms x in this sequence, A374204(x) = 1, and they form a subsequence of all terms k for which A374204(k) = 1, that might be sequence A086748.
LINKS
PROG
(PARI) isA374221 = A374220;
CROSSREFS
Cf. A000203, A005940, A347381, A374200, A374204, A374220 (characteristic function).
Cf. also A086748 and A347391 (very likely a subsequence).
Sequence in context: A372590 A242669 A090829 * A236244 A141290 A010752
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jul 09 2024
STATUS
approved