A280324 Number of lunar months of lunisolar cycles.

12, 25, 37, 99, 136, 235, 4131, 12628

Offset

1,1

Comments

Number of synodic (lunar) months that better approximate (in the sense of continued fractions) an integral number of tropical years. See A280323 (number of corresponding tropical years) for comments and links.

Links

Table of n, a(n) for n=1..8.

Formula

For n > 2, a(n) = a(n-2) modulo a(n-1).

Example

A280323(1) = 1 year exceeds a(1) = 12 lunar months by almost 11 days.
A280323(5) = 11 years exceeds a(5) = 136 lunar months by about 1.5 days.
A280323(6) = 19 years falls short of a(6) = 235 lunar months by about 2 hours.

Crossrefs

Cf. A280325.

Sequence in context: A372029 A186620 A042851 * A041280 A132754 A250666

Adjacent sequences: A280321 A280322 A280323 * A280325 A280326 A280327

Keyword

nonn,fini,full

Author

Jean-Christophe Hervé, Dec 31 2016

Status

approved