A135702 Decimal expansion of 3*Sum_{k=1..inf} 1/(10^k-1).

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

Offset

0,1

Comments

Equals: 3*A073668, also A065444/3.

Links

G. C. Greubel, Table of n, a(n) for n = 0..2500

Example

0.36697273...

Mathematica

RealDigits[9*N[ (1/3) Sum[1/(10^k - 1), {k, 1, Infinity}], 120]] [[1]]

Prog

(PARI) 3*suminf(k=1, 1/(10^k-1)) \\ Michel Marcus, Oct 30 2016

Crossrefs

Cf. A073668, A065444.

Sequence in context: A342425 A318845 A147866 * A108850 A111652 A159787

Adjacent sequences: A135699 A135700 A135701 * A135703 A135704 A135705

Keyword

nonn,cons

Author

Eric Desbiaux, Mar 03 2008

Status

approved