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A057347 Leap years in the Islamic calendar starting year 1 AH (Anno Hegirae) = 622 CE (Common Era or AD). There are 11 leap years in a 30 year cycle. 3
2, 5, 7, 10, 13, 16, 18, 21, 24, 26, 29, 32, 35, 37, 40, 43, 46, 48, 51, 54, 56, 59, 62, 65, 67, 70, 73, 76, 78, 81, 84, 86, 89, 92, 95, 97, 100, 103, 106, 108, 111, 114, 116, 119, 122, 125, 127, 130, 133, 136, 138, 141, 144, 146, 149, 152, 155, 157, 160, 163, 166 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

An Islamic year approximates 12 lunar months with 354 11/30 days (or 30 years with 10631 days)

REFERENCES

N. Dershowitz and E. M. Reingold, Calendrical Calculations, Cambridge University Press, 1997.

LINKS

N. Dershowitz and E. M. Reingold, Calendrical Calculations Web Site

FORMULA

a(n) = floor((30n - 4)/11), ((14 + 11*n) mod 30) < 11

CROSSREFS

A008685, Islamic month pattern A057348, A057349.

Sequence in context: A038127 A140398 A081838 * A067008 A189757 A094065

Adjacent sequences:  A057344 A057345 A057346 * A057348 A057349 A057350

KEYWORD

nonn,easy

AUTHOR

Mitch Harris (Harris.Mitchell(AT)mgh.harvard.edu)

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Last modified February 15 21:56 EST 2012. Contains 205860 sequences.