A276665 In the '3x+1' problem, these values for the starting value set new records for both the number of steps and the highest point of trajectory before reaching 1.

1, 2, 3, 7, 27, 703, 26623

Offset

1,2

Comments

Both the 3x+1 steps and the halving steps are counted.

Links

Table of n, a(n) for n=1..7.

José Eduardo Gaboardi de Carvalho, Java program

Crossrefs

Intersection of A006877 and A006884.

Sequence in context: A137075 A270347 A060412 * A062573 A019435 A061092

Adjacent sequences: A276662 A276663 A276664 * A276666 A276667 A276668

Keyword

nonn,more

Author

José Eduardo Gaboardi de Carvalho, Sep 12 2016

Status

approved