A286127 Decimal expansion of Sum_{n>=1} A285388(n-1)/A285388(n).

1, 5, 3, 1, 0, 2, 6, 2, 4, 5, 8, 9, 0, 0, 2, 1, 1, 9, 2, 1, 6, 2, 2, 3, 1, 6, 7, 1, 5, 9, 5, 3, 0, 5, 3, 2, 1, 0, 8, 6, 5, 8, 0, 4, 5, 5, 6, 8, 1, 5, 1, 0, 2, 3, 1, 2, 3, 9, 1, 2, 0, 6, 0, 8, 4, 6, 0, 2, 7, 0, 4, 5, 1, 4, 9, 6, 8, 1, 3, 8, 8, 7, 6, 3, 9, 4, 8, 6, 5, 8, 2, 9, 6, 3, 2, 5, 1, 2, 3, 4, 9, 9, 3, 9, 3

Offset

-1,2

Links

Table of n, a(n) for n=-1..103.

Example

0.01531026245890021192162231671595305321086580455681510231239120608460270451...

Mathematica

a388[i_] = Numerator[2^(1 - 2 i^2) i Binomial[2 i^2, i^2]];
RealDigits[N[Sum[a388[i-1]/a388[i], {i, 1, 50}]], 10]

Crossrefs

Cf. A285388.

Sequence in context: A265729 A181886 A126853 * A201654 A265606 A368602

Adjacent sequences: A286124 A286125 A286126 * A286128 A286129 A286130

Keyword

nonn,cons

Author

Ralf Steiner, May 03 2017

Extensions

More terms from Robert G. Wilson v, May 03 2017

Status

approved