id:A057347 - OEIS Search Results

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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.

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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; listen)

	OFFSET	`1,1`
	COMMENT	`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 this_sequence A067008 A094065 A073593` `Adjacent sequences: A057344 A057345 A057346 this_sequence A057348 A057349 A057350`
	KEYWORD	`nonn,easy`
	AUTHOR	`Mitch Harris (Harris.Mitchell(AT)mgh.harvard.edu)`

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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.

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