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A317967 Number of connected line structures or "topoglyphs" with n regions. 2
1, 1, 4, 23, 186 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

The precise definition is hard to understand from the article. But Marcel Golay was a famous scientist, and this article seems to have been overlooked, so the sequences are worth placing on record.

REFERENCES

Marcel J. E. Golay, Topoglyphs, IEEE Trans. Computers, C-27 (No. 2, Feb. 1978), 164-167.

LINKS

Table of n, a(n) for n=0..4.

N. J. A. Sloane, Annotated scan of the Golay article

CROSSREFS

Cf. A317968.

A250001 is a similar sequence.

Sequence in context: A192840 A302189 A292971 * A186117 A108953 A222454

Adjacent sequences:  A317964 A317965 A317966 * A317968 A317969 A317970

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Aug 27 2018

STATUS

approved

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Last modified September 21 12:54 EDT 2021. Contains 347598 sequences. (Running on oeis4.)