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A317968 Number of (not necessarily connected) line structures or "topoglyphs" with n regions. 1
1, 1, 5, 28, 220 (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. A317967.

A250001 is a similar sequence.

Sequence in context: A332711 A292426 A347005 * A107875 A340904 A038172

Adjacent sequences:  A317965 A317966 A317967 * A317969 A317970 A317971

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Aug 27 2018

STATUS

approved

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Last modified September 28 15:46 EDT 2021. Contains 347716 sequences. (Running on oeis4.)