A219781 Decimal expansion of Sum_{n = -infinity..infinity} 5^(n/2)*((1+sqrt(5))/2)^(-n^2).

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

Offset

1,1

Comments

Constant is associated with A135961.

Links

Table of n, a(n) for n=1..87.

Example

3.5769727481316948565395...

Mathematica

RealDigits[N[Sum[5^(k/2)*((1+Sqrt[5])/2)^(-k^2), {k, -Infinity, Infinity}], 131], 10, 130][[1]]

Crossrefs

Cf. A135961, A135741.

Sequence in context: A340665 A071581 A184722 * A215107 A084393 A100005

Adjacent sequences: A219778 A219779 A219780 * A219782 A219783 A219784

Keyword

nonn,cons

Author

Vaclav Kotesovec, Nov 29 2012

Status

approved