A073662 - OEIS

This site is supported by donations to The OEIS Foundation.

A073662

Rearrangement of even numbers such that a(k)*a(k+1) + 1 is a prime for all k.

2, 6, 10, 4, 18, 22, 16, 12, 8, 14, 20, 26, 36, 28, 24, 32, 38, 42, 34, 30, 40, 52, 46, 66, 48, 44, 54, 64, 70, 60, 50, 56, 80, 68, 62, 84, 74, 90, 72, 58, 76, 88, 94, 78, 82, 96, 100, 106, 120, 86, 98, 104, 122, 108, 112, 118, 102, 116, 132, 124, 142, 114, 110, 128, 92 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	COMMENTS	`a(1)=2; a(n) is the smallest number not already in the sequence such that a(n)*a(n-1) + 1 is a prime. Some numbers retain their places (that is an even number 2n retains its n-th position), such numbers are in A076023.`
	CROSSREFS	`Cf. A073661.` `Sequence in context: A117541 A095105 A052194 * A086553 A004055 A077933` `Adjacent sequences: A073659 A073660 A073661 * A073663 A073664 A073665`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 10 2002`
	EXTENSIONS	`More terms from Hans Havermann (gladhobo(AT)teksavvy.com), Sep 23 2002`

Content is available under The OEIS End-User License Agreement .

Last modified February 17 16:13 EST 2012. Contains 206050 sequences.