A317968 Number of (not necessarily connected) line structures or "topoglyphs" with n regions.

1, 1, 5, 28, 220

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: A347005 A356025 A367272 * A107875 A340904 A038172

Adjacent sequences: A317965 A317966 A317967 * A317969 A317970 A317971

Keyword

nonn,more

Author

N. J. A. Sloane, Aug 27 2018

Status

approved