A087972 Maximal term in Collatz-iteration started at 3^n+1.

2, 4, 16, 52, 9232, 244, 9232, 2464, 10528, 19684, 88576, 2270104, 1008916, 1594324, 7174456, 65451076, 64570084, 129140164, 1570824736, 1961316232, 8825923024, 10460353204, 47071589416, 105911076184, 423644304724, 66034034786644

Offset: 0

Author

Labos Elemer, Sep 24 2003

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 0..1000

Crossrefs

Cf. A025586, A087701, A087973.

Formula

a(n) = A025586(3^n+1).

Extensions

Offset changed to 0 and a(0) prepended by Amiram Eldar, Jun 04 2024