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A006444 Number of 2-connected planar maps with n edges.
(Formerly M0804)
1
0, 1, 2, 3, 6, 14, 30, 77, 196, 525, 1414, 3960, 11056, 31636, 90818, 264657, 774146, 2289787, 6798562, 20354005, 61164374, 184985060, 561433922, 1712696708, 5241637812 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

REFERENCES

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

T. R. S. Walsh, personal communication.

LINKS

Table of n, a(n) for n=1..25.

T. R. S. Walsh, Number of sensed planar maps with n edges and m vertices

CROSSREFS

Sequence in context: A106364 A211931 A264078 * A335242 A032047 A032065

Adjacent sequences:  A006441 A006442 A006443 * A006445 A006446 A006447

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified May 11 19:29 EDT 2021. Contains 343808 sequences. (Running on oeis4.)