The ISC currently accepts either floating point expressions or
correct Maple syntax as input. However, for Maple syntax requiring too
long for evaluation, a timeout has been implemented.

Factors of ten (and decimal points) are ignored in the input: you should
check the results and rescale as required.
For example, see 1/640.

Related sites:

The Inverse Symbolic Calculator (ISC) uses a combination of lookup tables and
integer relation algorithms in order to associate a closed form representation with
a user-defined, truncated decimal expansion (written as a floating point expression).
The lookup tables include a substantial data set compiled by S. Plouffe both before
and during his period as an employee at CECM.

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Standard lookup results for **0.00156250000**

## Best guess: 1/64

1/64 | 1562500000000000 |

5/32 | |

Sum(1/2^A020462(n),n=1..inf) | 1562500000000001 |

Sum(1/2^A001303(n),n=1..inf) | 1562500000000088 |

Sum(1/2^A008380(n),n=1..inf) | |

Sum(1/2^A002170(n),n=1..inf) | 1562500000000355 |

Sum(1/2^A002918(n),n=1..inf) | |

Sum(1/2^A005399(n),n=1..inf) | |

Sum(1/2^A001187(n),n=1..inf) | 1562500000003637 |

Sum(1/2^A003633(n),n=1..inf) | |

Sum(1/2^A000561(n),n=1..inf) | 1562500000005684 |

Sum(1/2^A005591(n),n=1..inf) | |

Sum(1/2^A005786(n),n=1..inf) | 1562500000011368 |