id:A037036 - OEIS Search Results

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Least k such that 2^n+1-k is a prime.

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0, 0, 0, 2, 0, 2, 4, 2, 0, 4, 4, 10, 4, 2, 4, 20, 0, 2, 6, 2, 4, 10, 4, 16, 4, 40, 6, 40, 58, 4, 36, 2, 6, 10, 42, 32, 6, 26, 46, 8, 88, 22, 12, 58, 18, 56, 22, 116, 60, 82, 28, 130, 48, 112, 34, 56, 6, 14, 28, 56, 94, 2, 58, 26, 60, 50, 6, 20, 24, 20, 36, 232, 94, 70, 36, 98, 16, 34 (list; graph; listen)

	OFFSET	`0,4`
	EXAMPLE	`a(5)=2 because 2^5+1-2=31 that is a prime`
	CROSSREFS	`Cf. A016014.` `Adjacent sequences: A037033 A037034 A037035 this_sequence A037037 A037038 A037039` `Sequence in context: A092594 A092741 A144182 this_sequence A055947 A015910 A164993`
	KEYWORD	`nonn`
	AUTHOR	`Felice Russo (felice.russo(AT)katamail.com)`
	EXTENSIONS	`More terms from Erich Friedman (erich.friedman(AT)stetson.edu)`

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Last modified November 9 12:23 EST 2009. Contains 166233 sequences.

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