A199715 A puzzle - explanation is not known.

2, 8, 2, 3, 4, 9, 4, 5, 9, 8

Offset

1,1

Comments

In November 1987, an editor at the Astrophysical Journal wrote to N. J. A. Sloane with three sequences whose explanation was not known to her. She said: "As to the pedigree of these sequences, not much is known. But they are US in origin, and /not/ Hungarian". One of the three was the number-theoretical sequence A007468. The other two are now A199714 and this sequence.

The synodic rotation period of the main-belt asteroid (6572) Carson, discovered 1938, is approximately 2.8235 hours. [Galad & Kornos] - Arkadiusz Wesolowski and Robert Israel, May 11 2018

Links

Table of n, a(n) for n=1..10.

A. Galad, L. Kornos, A sample of lightcurves from Modra, Minor Planet Bull. 35 (2) (2008) 78-81

Crossrefs

Cf. A007468, A199714.

Sequence in context: A173686 A090975 A257579 * A296049 A074962 A064863

Adjacent sequences: A199712 A199713 A199714 * A199716 A199717 A199718

Keyword

nonn,unkn

Author

N. J. A. Sloane, Nov 09 2011

Status

approved