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A181528 Number of connected graphs with n edges embeddable into square lattice 0
1, 1, 2, 4, 6, 14, 28, 68, 156, 399, 1012, 2732, 7385, 20665, 58377 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

a(n)<= number of connected planar graphs with n edges A046091

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

For n=3 a(3)=2

CROSSREFS

Cf. A046091

Sequence in context: A325868 A251581 A151794 * A251393 A058059 A053686

Adjacent sequences:  A181525 A181526 A181527 * A181529 A181530 A181531

KEYWORD

nonn

AUTHOR

I. E. Kashuba (kashuba(AT)bitp.kiev.ua), Oct 27 2010

STATUS

approved

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Last modified October 18 00:21 EDT 2019. Contains 328135 sequences. (Running on oeis4.)