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# User:Jean-Bernard François

From OeisWiki

## $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

## Useful Links

## Others

Collatz | Diophantine | Primes | Number Theory

Sequence of the Day |

[talk]

## Sequence of the Day for October 23

A105027 Write numbers in binary under each other; to get the next block of2 k, k ≥ 0, |

2 k |

- { 0, 1, 3, 2, 6, 5, 4, 7, ... }

n > 0 |

k |

........0 ........1 ......1 0 <- Starting here, the upward diagonals ......1 1 read 11, 10 giving the block 3, 2. ....1 0 0 <- Starting here, the upward diagonals ....1 0 1 read 110, 101, 100, 111, ....1 1 0 giving the block 6, 5, 4, 7. ....1 1 1 ..1 0 0 0 ..1 0 0 1 ..1 0 1 0 ..1 0 1 1 ..1 1 0 0 ..1 1 0 1 ..1 1 1 0 ..1 1 1 1