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Revision History for A210667 (Underlined text is an addition; strikethrough text is a ~~deletion~~.)
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A210667

Number of equivalence classes of S_n under transformations of positionally adjacent elements of the form abc <--> acb where a<b<c.
(history; published version)

#36 by Alois P. Heinz at Tue Aug 13 19:40:40 EDT 2013

STATUS

editing

approved

#35 by Alois P. Heinz at Tue Aug 13 19:40:21 EDT 2013

EXAMPLE

Contribution fromFrom Alois P. Heinz, May 16 2012: (Start)

STATUS

approved

editing

#34 by Alois P. Heinz at Wed May 16 22:33:40 EDT 2012

STATUS

editing

approved

#33 by Alois P. Heinz at Wed May 16 22:33:36 EDT 2012

OFFSET

30,3

STATUS

approved

editing

#32 by Alois P. Heinz at Wed May 16 21:41:54 EDT 2012

STATUS

editing

approved

#31 by Alois P. Heinz at Wed May 16 21:41:42 EDT 2012

EXAMPLE

Contribution from _Alois P. Heinz, _, May 16 2012: (Start)

#30 by Alois P. Heinz at Wed May 16 21:41:17 EDT 2012

EXAMPLE

Contribution from Alois P. Heinz, May 16 2012: (Start)

a(3) = 5: {123, 132}, {213}, {231}, {312}, {321}.

a(4) = 16: {1234, 1243, 1324, 1423}, {1342, 1432}, {2134, 2143}, {2314}, {2341, 2431}, {2413}, {3124, 3142}, {3214}, {3241}, {3412}, {3421}, {4123, 4132}, {4213}, {4231}, {4312}, {4321}. (End)

#29 by Alois P. Heinz at Wed May 16 21:36:14 EDT 2012

CROSSREFS

Cf. A210668, A210669, A210671, A212417.

#28 by Alois P. Heinz at Wed May 16 21:35:28 EDT 2012

	DATA	`1, 1, 2, 5, 16, 62, 284, 1507, 9104, 61766`
	OFFSET	`3,13`
	EXTENSIONS	`a(0)-a(2), a(9) from Alois P. Heinz, May 16 2012`
	STATUS	`approved` `editing`

#27 by T. D. Noe at Wed May 16 13:44:56 EDT 2012

STATUS

proposed

approved

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Last modified August 30 07:09 EDT 2024. Contains 375532 sequences. (Running on oeis4.)