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A283843 a(n) = A063776(n) + 1. 2

%I

%S 3,3,5,5,9,13,21,33,61,105,189,345,633,1173,2193,4097,7713,14573,

%T 27597,52433,99881,190653,364725,699073,1342185,2581113,4971069,

%U 9586985,18512793,35791473,69273669,134217729,260301177,505290273,981706833

%N a(n) = A063776(n) + 1.

%H Seiichi Manyama, <a href="/A283843/b283843.txt">Table of n, a(n) for n = 1..3333</a>

%H Juhani Karhumäki, S. Puzynina, M. Rao, M. A. Whiteland, <a href="https://arxiv.org/abs/1605.03319">On cardinalities of k-abelian equivalence classes</a>, arXiv preprint arXiv:1605.03319 [math.CO], 2016.

%t Table[a=Select[Divisors[n], OddQ[#]&]; 1 + Apply[Plus, 2^(n/a) EulerPhi[a]]/n, {n, 1, 35}] (* _Vincenzo Librandi_, Mar 29 2017 *)

%Y Cf. A063776.

%K nonn

%O 1,1

%A _N. J. A. Sloane_, Mar 28 2017

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Last modified January 21 03:58 EST 2022. Contains 350473 sequences. (Running on oeis4.)