A073830 - OEIS

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A073830

4*((n-1)!+1)+n mod n*(n+2).

0, 2, 0, 8, 0, 10, 56, 12, 22, 14, 0, 16, 182, 18, 34, 20, 0, 22, 380, 24, 46, 26, 552, 28, 29, 30, 58, 32, 0, 34, 992, 36, 37, 38, 74, 40, 1406, 42, 82, 44, 0, 46, 1892, 48, 94, 50, 2256, 52, 53, 54, 106, 56, 2862, 58, 59, 60, 118, 62, 0, 64, 3782, 66, 67, 68, 134, 70 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	COMMENTS	`For n>1: a(n)=0 iff (n, n+2) are twin primes (Clement, 1949).`
	LINKS	`Chris Caldwell, Twin Prime`
	FORMULA	`a(n) = A073829(n) mod A005563(n).`
	CROSSREFS	`Cf. A001359, A006512, A073831, A073832.` `Sequence in context: A200489 A011124 A011250 * A053205 A167029 A094030` `Adjacent sequences: A073827 A073828 A073829 * A073831 A073832 A073833`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 12 2002`

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Last modified February 15 21:45 EST 2012. Contains 205860 sequences.