Collatz Streetmap

• File of first 10K Collatz sequences, ascending start values, with lengths
• The Collatz-Problem. A view into some 3x+1-trees and a new fractal graphic representation. Gottfried Helms, Univ. Kassel
• Collatzfolgen und Schachbrett auf Wikibooks

Patterns in similiar sequences

• 142, 143 with same length (from A070165):

142/104: [142 m  71 d 214 m 107 d 322 m 161 d 484 m  242 m 121 d | 364, 182, 91, ... 10, 5, 16, 8, 4, 2, 1]
           +1  *6+4    +1  *6+4    +1  *6+4    +1   *6+4  *6+2      =    =  ...
143/104: [143 d 430 m 215 d 646 m 323 d 970 m 485 d 1456 m 728 m | 364, 182, 91, ... 10, 5, 16, 8, 4, 2, 1]

• Continued to the left, this pattern changes when a multiple of 3 is reached in the lower row:

124/109: [124 m  62 m  31 d  94 m  47 d 142 m  71 d 214 m 107 d 322 m 161 d 484 m  242 m 121 d | 364 ...
           +1  *6+4  *6+2     =     =     =     =     =     =     =     =     =      =     =       = ...
125/109: [125 d 376 m 188 m  94 m  47 d 142 m  71 d 214 m 107 d 322 m 161 d 484 m  242 m 121 d | 364 ...
           +1  --4/6   +2    +1  *6+4    +1  *6+4    +1  *6+4    +1= *6+4    +1   *6+4  *6+2       = ...
126/109: [126 m  63 d 190 m  95 d 286 m 143 d 430 m 215 d 646 m 323 d 970 m 485 d 1456 m 728 m | 364 ...