The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A066222

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A066222

Bisection of A001189.
(history; published version)

#5 by Jon E. Schoenfield at Mon Dec 26 15:22:22 EST 2016

STATUS

editing

approved

#4 by Jon E. Schoenfield at Mon Dec 26 15:22:19 EST 2016

EXTENSIONS

More terms from _Frank Ellermann, _, Jan 01, 2002

STATUS

approved

editing

#3 by Russ Cox at Fri Mar 30 16:49:17 EDT 2012

AUTHOR

_N. J. A. Sloane (njas(AT)research.att.com), _, Dec 19 2001

Discussion

Fri Mar 30

16:49

OEIS Server: https://oeis.org/edit/global/110

#2 by N. J. A. Sloane at Fri Feb 27 03:00:00 EST 2009

KEYWORD

nonn,easy,new

AUTHOR

N. J. A. Sloane (njas, (AT)research.att.com), Dec 19 2001

#1 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

NAME

Bisection of A001189.

DATA

1, 9, 75, 763, 9495, 140151, 2390479, 46206735, 997313823, 23758664095, 618884638911, 17492190577599, 532985208200575, 17411277367391103, 606917269909048575, 22481059424730751231, 881687990282453393919

OFFSET

0,2

COMMENTS

a(n) is the number of sets of disjoint pairs that can be chosen from 2*n items. - Ron Zeno (rzeno(AT)hotmail.com), Feb 06 2002

KEYWORD

nonn,easy

AUTHOR

njas, Dec 19 2001

EXTENSIONS

More terms from Frank Ellermann, Jan 01, 2002

STATUS

approved