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A072552 Number of connected planar regular graphs of degree 4 with n nodes. 2
1, 0, 1, 1, 3, 3, 13, 21, 68, 166, 543, 1605, 5413 (list; graph; refs; listen; history; text; internal format)
OFFSET

6,5

COMMENTS

Numbers were obtained using the graph generator GENREG in combination with a test for planarity implemented by M. Raitner.

LINKS

Table of n, a(n) for n=6..18.

M. Meringer, GENREG

M. Meringer, Tables of Regular Graphs

M. Raitner, Test for planarity

Robert E. Tuzun and Adam S. Sikora, Verification Of The Jones Unknot Conjecture Up To 22 Crossings, arXiv:1606.06671 [math.GT] (see table 2).

CROSSREFS

Cf. A005964, A006820, A078666, A292515 (4-edge-connected graphs only).

Sequence in context: A049768 A209390 A095336 * A217246 A186743 A219314

Adjacent sequences:  A072549 A072550 A072551 * A072553 A072554 A072555

KEYWORD

nonn

AUTHOR

Markus Meringer (meringer(AT)uni-bayreuth.de), Aug 05 2002

STATUS

approved

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Last modified February 24 17:16 EST 2018. Contains 299624 sequences. (Running on oeis4.)