id:A102904 - OEIS Search Results

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Primes of the form 3^n+20=3^n+19+1.

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23, 29, 47, 101, 263, 2207, 6581, 59069, 177167, 4782989, 984770902183611232901, 174449211009120179071170527, 278128389443693511257285776231781, 7509466514979724803946715958257567 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`If 3^n+20 is prime then a[m]=3^n+20`
	MATHEMATICA	`a = Delete[Union[Flatten[Table[If [PrimeQ[3^n + 20] == True, 3^n + 20, 0], {n, 1, 200}]]], 1]`
	CROSSREFS	`Cf. A000960.` `Sequence in context: A127834 A108111 A085713 this_sequence A108249 A045120 A097436` `Adjacent sequences: A102901 A102902 A102903 this_sequence A102905 A102906 A102907`
	KEYWORD	`nonn`
	AUTHOR	`Roger Lee Bagula (rlbagulatftn(AT)yahoo.com), Mar 01 2005`

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Last modified November 24 19:42 EST 2009. Contains 167435 sequences.

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