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 A326141 Odd numbers n for which A318879(n) is not zero and A318879(n) divides A318878(n); odd numbers such that A326140(n) = A318879(n). 5
 105, 195, 4785, 22515, 56865, 228285, 237315, 484245, 671853, 1838145, 1946955, 3446895, 4522695, 12955245, 37730865, 52475055, 53568885, 87612975 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Not a subsequence of A036798, even though many terms are members. Questions: Are all terms multiples of three? Multiples of 3^(2k+1) but not of 3^(2k)? Are any of the terms included in A228058, A326137? LINKS PROG (PARI) isA326141(n) = if(!(n%2), 0, my(t=0, u=0); fordiv(n, d, d -= 2*eulerphi(d); if(d<0, t -= d, u += d)); (gcd(t, u)==u)); CROSSREFS Cf. A033879, A083254, A036798, A228058, A318878, A318879, A326137, A326140. Cf. also A325981, A326131. Sequence in context: A046887 A026066 A167629 * A347881 A044337 A044718 Adjacent sequences:  A326138 A326139 A326140 * A326142 A326143 A326144 KEYWORD nonn,more AUTHOR Antti Karttunen, Jun 09 2019 STATUS approved

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Last modified July 3 17:31 EDT 2022. Contains 355055 sequences. (Running on oeis4.)