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A106364 Mobiles (cycle rooted trees) where no branch is identical to its adjacent neighbor. 1

%I #13 Oct 09 2017 08:27:04

%S 1,1,1,2,3,6,14,30,68,159,381,914,2238,5508,13701,34288,86401,218818,

%T 557067,1424083,3655221,9414642,24328133,63049458,163844470,426831429,

%U 1114496370,2916228670,7645777113,20082543578,52839735409,139251228967

%N Mobiles (cycle rooted trees) where no branch is identical to its adjacent neighbor.

%H <a href="/index/Mo#mobiles">Index entries for sequences related to mobiles</a>

%F Shifts left under CycleBG transform.

%F CycleBG transform T(A) = invMOEBIUS(invEULER(Carlitz(A)) + A(x^2) - A) + A.

%F Carlitz transform T(A(x)) has g.f. 1/(1-sum(k>0, (-1)^(k+1)*A(x^k))).

%F General formula for the CycleBG transform: T(A)(x) = A(x) - Sum_{k>=0} A(x^{2k+1}) + Sum_{k>=1} (phi(k)/k)*log(Carlitz(A)(x^k)). For a proof, see the links in the documentation of sequence A106368. - _Petros Hadjicostas_, Oct 08 2017

%Y Cf. A032200.

%K nonn,eigen

%O 1,4

%A _Christian G. Bower_, Apr 29 2005

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