id:A087548 - OEIS Search Results

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Beginning with 1, smallest multiple of n such that a(n)*a(n-1) +1 is a prime.

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1

1, 2, 3, 4, 10, 6, 7, 16, 27, 10, 33, 12, 13, 42, 15, 16, 85, 18, 114, 20, 21, 22, 46, 72, 25, 52, 189, 84, 29, 60, 31, 192, 33, 34, 70, 36, 185, 228, 39, 80, 164, 420, 43, 220, 45, 138, 94, 48, 147, 50, 51, 312, 106, 270, 55, 168, 171, 348, 59, 60, 122, 620, 126, 256, 195 (list; graph; listen)

	OFFSET	`1,2`
	MAPLE	`a[1] := 1:for n from 2 to 120 do l := 1:while(not isprime(a[n-1]ln+1)) do l := l+1: od:a[n] := l*n:od:seq(a[j], j=1..120); (from Sascha Kurz)`
	CROSSREFS	`Adjacent sequences: A087545 A087546 A087547 this_sequence A087549 A087550 A087551` `Sequence in context: A140598 A129920 A065634 this_sequence A111619 A143178 A084190`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 13 2003`
	EXTENSIONS	`Corrected and extended by Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Sep 22 2003`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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