The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A087970 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A087970

Maximal term in Collatz-iteration started at 2^n+1.
(history; published version)

#11 by OEIS Server at Tue Jun 04 01:26:37 EDT 2024

LINKS

Amiram Eldar, <a href="/A087970/b087970_1.txt">Table of n, a(n) for n = 0..1000</a>

#10 by Joerg Arndt at Tue Jun 04 01:26:37 EDT 2024

STATUS

reviewed

approved

Discussion

Tue Jun 04

01:26

OEIS Server: Installed first b-file as b087970.txt.

#9 by Michel Marcus at Tue Jun 04 01:11:48 EDT 2024

STATUS

proposed

reviewed

#8 by Amiram Eldar at Tue Jun 04 01:06:14 EDT 2024

STATUS

editing

proposed

#7 by Amiram Eldar at Tue Jun 04 00:19:44 EDT 2024

LINKS

Amiram Eldar, <a href="/A087970/b087970_1.txt">Table of n, a(n) for n = 0..1000</a>

#6 by Amiram Eldar at Tue Jun 04 00:19:30 EDT 2024

OFFSET

1,0,1

#5 by Amiram Eldar at Tue Jun 04 00:17:28 EDT 2024

CROSSREFS

Cf. A000051, A025586, A087701, A087972.

#4 by Amiram Eldar at Tue Jun 04 00:16:26 EDT 2024

NAME

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

DATA

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

FORMULA

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

EXTENSIONS

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

STATUS

approved

editing

#3 by N. J. A. Sloane at Tue Oct 15 22:32:18 EDT 2013

AUTHOR

_Labos E. (labos(AT)ana.sote.hu), Elemer_, Sep 24 2003

Discussion

Tue Oct 15

22:32

OEIS Server: https://oeis.org/edit/global/2029

#2 by N. J. A. Sloane at Tue Jan 24 03:00:00 EST 2006

KEYWORD

nonn,new

nonn

AUTHOR

Labos E. (labos(AT)ana1ana.sote.hu), Sep 24 2003