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Partial sums of length of terms in A081368 where A081368(1) is set to 10.

E = Sum[A081368[n]/10^a(n),{n,1,Length}]; Solve for a(n).

(PARI) v=[71, 828, 1828, 45904, 5235360, 2874713, 52662497, 757247093, 6999595749, 66967627724, 76630353547, 5945713821785, 25166427427466, 391932003059921, 8174135966290435, 72900334295260595, 630738132328627943];

concat([0], vector(#v, n, sum(j=1, n, #digits(v[j])))) \\ Joerg Arndt, Aug 13 2013

nonn,base,less,changed

Partial sums of length of terms in A081368 where A081368(01) is set to 1.

01,2

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Joerg Arndt: That should be it.  I'll try to add a program.

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ThePartial sums of sequencelength of powersterms necessaryin toA081368 reconstructwhere Exp[A081368(0] from) is set to A0813681.

Previous name was: The sequence of powers necessary to reconstruct Exp([0) = ] from Thanh Diep's sequence A081368: E=Sum[A081368[n]/10^a(n),{n,1,Length}].

Edited by Joerg Arndt and Michel Marcus, Aug 13 2013

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Michel Marcus: Partial sums OK.
Like this then ?

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Clear[a, n];

Joerg Arndt: Doesn't matter...
Isn't this one just: "Partial sums of length of terms in A081368." ?

Joerg Arndt: ...where A081368(0) is set to 1.

The sequence of powers necessary to reconstruct Exp[0] from Thanh Diep's sequence A081368.

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