A280800 a(n) = A049501(cototient(n)).

0, 0, 0, 1, 0, 1, 0, 1, 0, 2, 0, 1, 0, 1, 0, 1, 0, 2, 0, 2, 1, 2, 0, 1, 1, 3, 1, 1, 0, 5, 0, 1, 2, 5, 1, 2, 0, 4, 0, 2, 0, 4, 0, 2, 4, 2, 0, 1, 0, 4, 1, 3, 0, 5, 0, 1, 4, 4, 0, 5, 0, 1, 2, 1, 1, 6, 0, 5, 2, 6, 0, 2, 0, 6, 1, 4, 1, 7, 0, 2, 2, 9, 0, 4, 4, 5, 0, 2, 0, 7, 1, 2, 1, 2, 1, 1, 0, 3, 1, 4, 0, 7, 0, 3, 3, 7, 0, 5, 0

Offset: 1

Author

Indranil Ghosh, Jan 08 2017

Keywords

• nonn

Comments

a(n) = major index (1st definition) of cototient(n), where cototient(n) = n - phi(n).

Examples

			For n = 10, A051953(n) = 6 and major index (1st definition) of 6 is 2. So, a(10) = 2.
		

Links

• Indranil Ghosh, Table of n, a(n) for n = 1..10000
• Indranil Ghosh, Python Program to generate the sequence

Crossrefs

Cf. A049501, A051953, A280726, A280799.

Formula

a(n) = A049501(A051953(n)).