id:A076948 - OEIS Search Results

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Smallest k such that nk-1 is a square, or 0 if no such number exists.

+0
2

1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 2, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 2, 1, 0, 0, 5, 0, 0, 0, 0, 5, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 10, 0, 0, 0, 0, 5, 0, 0, 2, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 10, 13, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 2, 0, 0, 0, 13, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 1, 0 (list; graph; listen)

	OFFSET	`1,13`
	MATHEMATICA	`Do[k = 1; While[k < 10^4 && !IntegerQ[Sqrt[n*k - 1]], k++ ]; If[k != 10^4, Print[k], Print[0]], {n, 1, 105}]`
	CROSSREFS	`Cf. A008784.` `Sequence in context: A003196 A062977 A072325 this_sequence A086071 A089813 A037845` `Adjacent sequences: A076945 A076946 A076947 this_sequence A076949 A076950 A076951`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Oct 20 2002`
	EXTENSIONS	`Edited and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Oct 21 2002`

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Last modified September 7 23:08 EDT 2008. Contains 143486 sequences.

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