id:A136240 - OEIS Search Results

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Numbers n among A006093 such that n^2 + n + 1 is prime.

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1, 2, 6, 12, 66, 78, 138, 150, 162, 192, 336, 348, 378, 456, 540, 612, 642, 726, 768, 918, 990, 1020, 1092, 1116, 1200, 1230, 1380, 1422, 1548, 1566, 1596, 1620, 1692, 1746, 1788, 1800, 1932, 1986, 2010, 2016, 2112, 2136, 2142, 2238, 2280, 2556, 2646 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`See A074268 for the primes associated with a(n).`
	FORMULA	`a(n) = A0065508(n) - 1.`
	CROSSREFS	`Cf. A136241.` `Sequence in context: A069047 A095921 A106037 this_sequence A090747 A076220 A107763` `Adjacent sequences: A136237 A136238 A136239 this_sequence A136241 A136242 A136243`
	KEYWORD	`nonn`
	AUTHOR	`Lekraj Beedassy (blekraj(AT)yahoo.com), Dec 23 2007`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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