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 A280815 a(n) = A049502(cototient(n)). 2
 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 3, 0, 0, 1, 2, 2, 0, 0, 3, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 2, 0, 0, 3, 0, 0, 4, 0, 0, 4, 0, 0, 2, 0, 1, 4, 0, 3, 1, 4, 0, 0, 0, 3, 2, 4, 1, 3, 0, 0, 2, 6, 0, 0, 4, 4, 0, 0, 0, 2, 2, 0, 1, 0, 3, 0, 0, 0, 3, 0, 0, 3, 0, 0, 1, 3, 0, 4, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,30 COMMENTS a(n) = major index (2nd definition) of cototient(n), where cototient(n) = n - phi(n). LINKS Indranil Ghosh, Table of n, a(n) for n = 1..10000 Indranil Ghosh, Python Program to generate the sequence FORMULA a(n) = A049502(A051953(n)). EXAMPLE For n = 30, cototient(n) = 22 and major index (2nd definition) of 22 is 3. So, a(n) = 3. CROSSREFS Cf. A049502, A051953, A280726, A280799, A280800. Sequence in context: A133573 A151859 A163541 * A165974 A090622 A035696 Adjacent sequences: A280812 A280813 A280814 * A280816 A280817 A280818 KEYWORD nonn AUTHOR Indranil Ghosh, Jan 08 2017 STATUS approved

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Last modified January 30 16:32 EST 2023. Contains 359945 sequences. (Running on oeis4.)