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A001574 Colored series-parallel networks.
(Formerly M2029 N0801)
0
0, 2, 12, 60, 292, 1438, 7180, 36566 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

J. Riordan, An Introduction to Combinatorial Analysis, Wiley, 1958, p. 159.

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=1..8.

CROSSREFS

Sequence in context: A062478 A005430 A094434 * A074445 A038154 A061834

Adjacent sequences:  A001571 A001572 A001573 * A001575 A001576 A001577

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified August 21 13:36 EDT 2017. Contains 290890 sequences.