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URL: https://oeis.org/history?seq=A007889

⇱ The On-Line Encyclopedia of Integer Sequences (OEIS)

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Number of intransitive (or alternating, or Stanley) trees: vertices are [0,n] and for no i<j<k are both (i,j) and (j,k) edges.
#78 by Sean A. Irvine at Wed Nov 05 15:21:45 EST 2025
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Discussion
Wed Nov 05
15:21
OEIS Server: https://oeis.org/edit/global/3061
#77 by Sean A. Irvine at Mon Sep 22 16:00:20 EDT 2025
PROG
Discussion
Mon Sep 22
16:00
OEIS Server: https://oeis.org/edit/global/3029
#76 by Michael De Vlieger at Mon Nov 06 07:17:54 EST 2023
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#75 by Joerg Arndt at Mon Nov 06 02:58:21 EST 2023
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#74 by Michel Marcus at Mon Nov 06 02:48:14 EST 2023
STATUS
#73 by Michel Marcus at Mon Nov 06 02:48:10 EST 2023
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#72 by Alois P. Heinz at Wed Nov 01 19:56:11 EDT 2023
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#71 by Alois P. Heinz at Wed Nov 01 15:07:24 EDT 2023
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Discussion
Wed Nov 01
17:17
Ira M. Gessel: OK
#70 by Alois P. Heinz at Wed Nov 01 15:06:01 EDT 2023
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#69 by Alois P. Heinz at Wed Nov 01 15:04:28 EDT 2023
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STATUS