id:A123365 - OEIS Search Results

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Values of n such that A046530(n) = (n+2)/3, where A046530 is the number of distinct residues of cubes mod n.

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1, 7, 13, 19, 31, 37, 43, 61, 67, 73, 79, 97, 103, 109, 127, 139, 151, 157, 163, 181, 193, 199, 211, 223, 229, 241, 271, 277, 283, 307, 313, 331, 337, 349, 367, 373, 379, 397, 409, 421, 433, 439, 457, 463, 487, 499, 523, 541, 547, 571, 577, 601, 607, 613, 619 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Conjecture. With the exception of the first term a(1)=1, this is exactly the sequence of primes of the form 6k+1 (A002476). This has been verified up to a(n)=2000.`
	CROSSREFS	`Cf. A002476, A046530, A123722, A123723.` `Sequence in context: A129389 A107925 A002476 this_sequence A144921 A040079 A038160` `Adjacent sequences: A123362 A123363 A123364 this_sequence A123366 A123367 A123368`
	KEYWORD	`nonn`
	AUTHOR	`John W. Layman (layman(AT)math.vt.edu), Oct 12 2006`

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

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