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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
1, 2, 3, 7, 27, 703, 26623 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 23 15:54 EDT 2017. Contains 292361 sequences.