User:Jean-Bernard François

$whoami?

I'm Jean-Bernard François (aka infofiltrage) born in France the 03/05/69 & DP Engineer (Engineering Graphics Software).

My current blog is Bondissant (almost art from geometry).

I love number theory, mathematics, and of course OEIS.

I only worked under Debian Linux System with LibreOffice, Inkscape and a LiberKey.

Contributions

A099730 | A000302

Useful Links

• HelpPage
• FAQ

Others

Collatz | Diophantine | Primes | Number Theory

Sequence of the Day

[talk]

Sequence of the Day for February 21

A088751: Decimal expansion of

x

, the real root of the equation

1 + ∑ ∞ k  = 1  pk x k = 0

, where

pn

is the

n

th prime.

− 0.68677783446063...

This is the inverse of Backhouse’s constant (A072508), a number that is somewhat harder to compute than this one.