id:A027702 - OEIS Search Results

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Numbers n such that n-th prime has even number of 1's in binary expansion and (n+1)st prime also has even number of 1's.

+0
1

2, 9, 23, 34, 55, 56, 59, 68, 69, 70, 71, 76, 91, 96, 108, 124, 141, 146, 147, 154, 165, 182, 183, 184, 199, 200, 208, 213, 214, 221, 222, 225, 226, 227, 236, 239, 240, 245, 252, 255, 256, 269, 280, 283, 286, 289, 290, 291, 292, 327, 339, 355, 356, 359, 365, 393, 396, 397, 406, 414, 419, 420 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`Select[Range[1000], EvenQ[DigitCount[Prime[ # ], 2][[1]]] && EvenQ[DigitCount[Prime[ # + 1], 2][[1]]] &] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Apr 21 2006`
	CROSSREFS	`Sequence in context: A082940 A032149 A032054 this_sequence A051897 A032636 A101986` `Adjacent sequences: A027699 A027700 A027701 this_sequence A027703 A027704 A027705`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`
	EXTENSIONS	`More terms from Scott Lindhurst (ScottL(AT)alumni.princeton.edu)`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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