The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A034799 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A034799

Triangle read by rows: T(n,k) is the number of partially labeled trees with n nodes, k of which are labeled, 0 <= k <= n.
(history; published version)

#18 by Alois P. Heinz at Thu Mar 23 19:28:23 EDT 2023

STATUS

proposed

approved

#17 by Andrew Howroyd at Thu Mar 23 18:40:27 EDT 2023

STATUS

editing

proposed

#16 by Andrew Howroyd at Thu Mar 23 18:38:58 EDT 2023

NAME

Triangle of read by rows: T(n,k) is the number of partially labeled trees by number of with n nodes and number , k of labelswhich are labeled, 0 <= k <= n.

AUTHOR

N. J. A. Sloane.

EXTENSIONS

Name edited by Andrew Howroyd, Mar 23 2023

STATUS

proposed

editing

Discussion

Thu Mar 23

18:40

Andrew Howroyd: Names of column sequences are much clearer. I have edited name accordingly.

#15 by Robert A. Russell at Thu Mar 23 16:40:27 EDT 2023

STATUS

editing

proposed

#14 by Robert A. Russell at Thu Mar 23 16:40:20 EDT 2023

CROSSREFS

Cf. Columns are A000055, A000081, A008295, A034800A000243, A000269, A000485, A000526, A064785.

Cf. A008295, A034800.

STATUS

approved

editing

#13 by Michel Marcus at Sat Sep 05 02:57:26 EDT 2020

STATUS

reviewed

approved

#12 by Joerg Arndt at Sat Sep 05 02:46:58 EDT 2020

STATUS

proposed

reviewed

#11 by Sean A. Irvine at Fri Sep 04 19:34:35 EDT 2020

STATUS

editing

proposed

#10 by Sean A. Irvine at Fri Sep 04 19:34:22 EDT 2020

EXAMPLE

Triangle begins:

1;

1, 1;

1, 1, 1;

1, 2, 3, 3;

2, 4, 9, 16, 16;

...

STATUS

proposed

editing

#9 by Sean A. Irvine at Fri Sep 04 19:28:07 EDT 2020

STATUS

editing

proposed