Template:Sequence of the Day for April 15

Intended for: April 15, 2013

Timetable

• First draft entered by Alonso del Arte on September 5, 2012 ✓
• Draft reviewed by Daniel Forgues on April 13, 2016 ✓
• Draft to be approved by March 15, 2013

Yesterday's SOTD * Tomorrow's SOTD

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A057466:

9√  10 e 8

.

{ 3.141598280658... }

Most infinite sums and products for

π

converge very slowly and can require thousands of terms to get just three or four digits. So it is a bit of a wonder that an expression so simple as this gets five digits right off the bat (five digits is good enough for many practical applications).