# [seqfan] A Pi-day self-chunking sequence (and the February 12th one)

Eric Angelini Eric.Angelini at kntv.be
Mon Mar 14 17:26:33 CET 2011

```F12 = 2,12,3,4,5,6,7,8,9,20,22,23,24,1,10,11,32,14,15,16,13,17,18,19,21,34,26,27,28,29,30,25,31,33,35,,37,38,36,39,40,41,42,43,44,45,47,...

Instead of reading from left to right the Pi constant -see previous post-, read F12 itself and chunk:

F12 = 2,12,3,4,5,6,7,8,9,20,22,23,24,1,10,11,32,14,15,16,13,17,18,19,21,34,26,...

F12 = 2,12|,3,4,5,6,7,8,9,20,22,23,24,1|,10,11,32|,14,15,16,13|,17,18,19,21,34|,26,...
2               12                    3          4             5

Modus operandi:

Read the first digit of F12 --> 2
Draw a stroke immediately after the next "2" --> ,12|
Read the next digit of F12 --> 1
Draw a stroke immediately after the next "1" --> ,1|
Read the next digit of F12 --> 2
Draw a stroke immediately after the next "2" --> ,32|
Read the next digit of F12 --> 3
Draw a stroke immediately after the next "1" --> ,13|
Read the next digit of F12 --> 4
Draw a stroke immediately after the next "4" --> ,34|
...

Again, the F12 sequence is a permutation of N as "we always..." etc.

Best,
É.

```