id:A090082 - OEIS Search Results

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Even pseudoprimes to base 5.

+0
14

4, 124, 5662, 11476, 59356, 80476, 91636, 250876, 261964, 482516, 1385836, 1892458, 1926676, 2428084, 2589796, 3743476, 4101796, 6797764, 9155476, 10701076, 10743436, 11263396, 13799836, 13859956, 15570556, 20396476 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`Do[s=Mod[ -1+5^(n-1), n]; If[Equal[s, 0]&&!PrimeQ[n]&&EvenQ[n], Print[n]], {n, 1, 1000000}]`
	CROSSREFS	`Cf. A005936.` `Sequence in context: A144993 A064681 A005936 this_sequence A068891 A073351 A068894` `Adjacent sequences: A090079 A090080 A090081 this_sequence A090083 A090084 A090085`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Nov 25 2003`
	EXTENSIONS	`More terms from Farideh Firoozbakht (mymontain(AT)yahoo.com), Sep 13 2006`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

AT&T Labs Research