Template:Sequence of the Day for June 15

Intended for: June 15, 2013

Timetable

• First draft entered by Alonso del Arte on May 27, 2012 ✓
• Draft reviewed by Daniel Forgues on June 14, 2016 ✓
• Draft approved by May 15, 2013

Yesterday's SOTD * Tomorrow's SOTD

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A004002: Benford numbers:

e ↑↑ n, n   ≥   0,

rounded to nearest integer.

{ 1, 3, 15, 3814279, ... }

These correspond to empty product

1, e = 2.718281..., e e = 15.15426...

and

e e e = 3814279.10476...

The next term,

e e e e

, is

2.331504399...  ×  10 1656520

.

See also: Knuth’s arrow notation.