A087970 - OEIS

A087970

Maximal term in Collatz-iteration started at 2^n+1.

2, 16, 16, 52, 52, 100, 196, 9232, 9232, 1540, 3076, 9232, 12292, 24580, 49156, 98308, 196612, 393220, 786436, 1572868, 3145732, 6291460, 12582916, 25165828, 50331652, 100663300, 201326596, 402653188, 805306372, 1610612740, 3221225476, 6442450948, 12884901892

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,1

LINKS

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

FORMULA

a(n) = A025586(2^n+1).

CROSSREFS

Cf. A000051, A025586, A087701, A087972.

Sequence in context: A263355 A066773 A138761 * A247634 A261617 A075376

Adjacent sequences: A087967 A087968 A087969 * A087971 A087972 A087973

KEYWORD

nonn

AUTHOR

Labos Elemer, Sep 24 2003

EXTENSIONS

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

STATUS

approved