Template:Sequence of the Day

[talk]

Sequence of the Day for January 31

A051006: The prime constant.

0.4146825098511116...

The formula is

∑ ∞ k  = 1 χ p (k ) 2 k

, where

χ p (n)

is the characteristic function of the primes. Essentially, this is an encoding of the prime numbers into a single real number in the unit interval.

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