A080209 - OEIS

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A080209

Gilbreath transform of the sequence of Sophie Germain primes (A005384), i.e. the diagonal of leading successive absolute differences of A005384.

2, 1, 1, 3, 1, 1, 1, 3, 1, 1, 1, 1, 3, 1, 1, 3, 1, 3, 1, 1, 1, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 1, 1, 3, 1, 3, 1, 1, 3, 1, 1, 1, 1, 1, 3, 1, 1, 3, 1, 3, 1, 1, 3, 1, 3, 1, 3, 1, 3, 1, 1, 3, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 1, 3, 1, 1, 3 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`Conjecture: The diagonal of leading successive absolute differences of the Sophie Germain primes consists, except for the initial 2, only of 1's and 3s.`
	LINKS	`Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.` `Eric Weisstein's World of Mathematics, Gilbreath's Conjecture`
	EXAMPLE	`The difference table begins:` `2` `3 1` `5 2 1` `11 6 4 3` `23 12 6 2 1` `29 6 6 0 2 1`
	CROSSREFS	`Cf. A005384, A054977, A036262.` `Sequence in context: A138138 A196931 A175465 * A127949 A167407 A051340` `Adjacent sequences: A080206 A080207 A080208 * A080210 A080211 A080212`
	KEYWORD	`nonn`
	AUTHOR	`John W. Layman (layman(AT)math.vt.edu), Mar 20 2003`

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.