A222291 Least number whose Collatz (3x+1) trajectory has a number greater than 10^n.

1, 3, 15, 27, 255, 703, 1819, 9663, 26623, 77671, 159487, 1212415, 4637979, 6631675, 19638399, 80049391, 319804831, 319804831, 319804831, 8528817511, 59436135663, 231913730799, 272025660543, 871673828443, 3716509988199, 3716509988199, 3716509988199

Offset: 0

Author

T. D. Noe, Feb 19 2013

Keywords

• nonn
• base

Links

• T. D. Noe, Table of n, a(n) for n = 0..37
• Hisanori Mishima, Relation between n and max(n) (part of a chapter about the Collatz conjecture; errors in higher values)
• Eric Roosendaal, 3x+1 path records
• Index entries for sequences related to 3x+1 (or Collatz) problem

Crossrefs

Cf. A006884 (3x+1 records), A222292 (base-2 version).

Cf. A224538.