The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A106241

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Triangle of coefficients arising in connection with enumeration of series-parallel networks.
(history; published version)

#7 by Andrew Howroyd at Tue Mar 30 12:41:34 EDT 2021

STATUS

reviewed

approved

#6 by Joerg Arndt at Tue Mar 30 03:44:05 EDT 2021

STATUS

proposed

reviewed

#5 by Michel Marcus at Tue Mar 30 03:43:22 EDT 2021

STATUS

editing

proposed

#4 by Michel Marcus at Tue Mar 30 03:43:20 EDT 2021

KEYWORD

nonn,tabl,more

STATUS

approved

editing

#3 by Russ Cox at Fri Mar 30 16:50:13 EDT 2012

AUTHOR

_N. J. A. Sloane (njas(AT)research.att.com), _, May 29 2005

Discussion

Fri Mar 30

16:50

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,tabl,new

AUTHOR

N. J. A. Sloane (njas, (AT)research.att.com), May 29 2005

#1 by N. J. A. Sloane at Tue Jul 19 03:00:00 EDT 2005

NAME

Triangle of coefficients arising in connection with enumeration of series-parallel networks.

DATA

1, 2, 2, 4, 16, 6, 8, 88, 116, 24, 16, 416, 1312, 888, 120

OFFSET

1,2

REFERENCES

J. Riordan, The blossoming of Schroeder's fourth problem, Acta Math., 137 (1976), 1-16.

EXAMPLE

Triangle begins:

1

2 2

4 16 6

8 88 116 24

KEYWORD

nonn,tabl

AUTHOR

njas, May 29 2005

STATUS

approved