A082486 Decimal expansion of the constant c satisfying Sum_{k>=1} 1/c^sqrtint(k) = 1 where sqrtint(k) = floor(sqrt(k)).

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

Offset

1,1

Links

Table of n, a(n) for n=1..105.

Formula

Equals 5/2 + sqrt(17)/2.

Example

4.5615528128088302749107049....
Sum_{k=1..1000} 1/c^sqrtint(k) = 0.9999999999999999998470351081791855275...

Mathematica

RealDigits[(5 + Sqrt[17])/2, 10, 100][[1]] (* Amiram Eldar, May 21 2022 *)

Crossrefs

Cf. A082483, A082484.

Sequence in context: A075566 A348355 A076087 * A106591 A106592 A106593

Adjacent sequences: A082483 A082484 A082485 * A082487 A082488 A082489

Keyword

cons,nonn

Author

Benoit Cloitre, Apr 28 2003

Status

approved