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A006302 Related to enumeration of rooted maps.
(Formerly M3622)
1
4, 28, 148, 704, 3176 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

It would be nice to have a more precise definition for this ancient sequence from the Walsh-Lehman paper. - N. J. A. Sloane, Jun 05 2017

REFERENCES

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=2..6.

T. R. S. Walsh and A. B. Lehman, Counting rooted maps by genus. II, J. Comb. Thy B13 (1972), 122-141.

CROSSREFS

Cf. A006303.

Sequence in context: A273611 A043013 A145544 * A272992 A272747 A123520

Adjacent sequences:  A006299 A006300 A006301 * A006303 A006304 A006305

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified October 4 18:32 EDT 2022. Contains 357239 sequences. (Running on oeis4.)