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A001575 Colored series-parallel networks.
(Formerly M4567 N1944)
0
0, 0, 8, 102, 948, 7900, 62928, 491832 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

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: A238947 A229452 A199816 * A090237 A222664 A190786

Adjacent sequences:  A001572 A001573 A001574 * A001576 A001577 A001578

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified August 20 13:04 EDT 2017. Contains 290835 sequences.