id:A134460 - OEIS Search Results

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First differences of A067186 (A067186 gives n such that 1+t(n) is prime, where t(n) is the n-th triangular number).

+0
2

2, 1, 3, 1, 3, 1, 4, 3, 1, 3, 4, 8, 5, 3, 1, 3, 4, 5, 4, 3, 1, 4, 3, 4, 1, 8, 4, 7, 1, 3, 1, 7, 4, 1, 19, 1, 3, 5, 8, 11, 4, 4, 1, 4, 3, 4, 5, 3, 13, 3, 4, 1, 3, 8, 4, 5, 8, 4, 11, 9, 4, 7, 4, 5, 4, 4, 3, 4, 4, 8, 9, 4, 7, 16, 1, 4, 4, 7, 4, 1, 8, 3, 1, 11, 5, 4, 3, 9, 11, 1, 8, 3, 1, 4, 3, 1, 3, 4, 13, 4, 3, 8 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Conjecture. Except for the first term a(1)=2, this sequence does not contain terms of the form 4k+2. (This has been confirmed for the first several thousand terms.)`
	CROSSREFS	`Cf. A000217, A067186.` `Adjacent sequences: A134457 A134458 A134459 this_sequence A134461 A134462 A134463` `Sequence in context: A082460 A029227 A029214 this_sequence A130158 A104984 A083868`
	KEYWORD	`nonn`
	AUTHOR	`John W. Layman (layman(AT)math.vt.edu), Oct 26 2007`

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Last modified January 8 02:43 EST 2009. Contains 152824 sequences.

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