id:A102708 - OEIS Search Results

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Composite numbers a(n) having a GCD with Pell_x(a(n))-1 equal to 1 (where Pell_x(n) is the x solution of the Pell-Fermat equation: x^2 - n y^2 = 1). There is no square in the sequence because the Pell-Fermat equation has no solution for them.

+0
1

27, 51, 65, 85, 123, 125, 145, 171, 185, 187, 243, 265, 267, 291, 325, 339, 363, 365, 387, 411, 425, 445, 451, 459, 481, 485, 493, 531, 533, 565, 603, 627, 629, 685, 697, 699, 731, 771, 779, 785, 803, 843, 845, 865, 867, 901, 925, 949, 963, 965, 985, 1003 (list; graph; listen)

	OFFSET	`0,1`
	CROSSREFS	`Sequence in context: A090760 A109067 A034595 this_sequence A154591 A044079 A044460` `Adjacent sequences: A102705 A102706 A102707 this_sequence A102709 A102710 A102711`
	KEYWORD	`nonn`
	AUTHOR	`Thomas Baruchel (baruchel(AT)users.sourceforge.net), Feb 05 2005`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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