A072171 Number of stars of visual magnitude n.

2, 6, 14, 71, 190, 610, 1929, 5946, 17765, 51094, 140062, 409194, 1196690, 3481113, 10126390, 29457184, 85689537, 249266759, 725105060, 2109295881, 6135840666, 17848866544

Offset

-1,1

Comments

These numbers are not well-defined and the sequence is included only for completeness.

For magnitude -1, the number includes any star whose magnitude is between -1.50 and -0.51, of which there are only two, Sirius and Canopus.

Links

Table of n, a(n) for n=-1..20.

David Haworth, How Many Stars You Can Observe

Crossrefs

Cf. A053406.

Sequence in context: A354533 A192764 A055691 * A371008 A308568 A296054

Adjacent sequences: A072168 A072169 A072170 * A072172 A072173 A072174

Keyword

nonn,dumb

Author

Robert G. Wilson v, Jun 28 2002

Extensions

Corrected a(5) to agree with the table at the Haworth link and edited the Comments.

Status

approved