id:A054256 - OEIS Search Results

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Concatenation of n in base 2 up to base 10 is prime, all numbers are interpreted as decimals.

+0
3

7, 33, 169, 197, 209, 351, 401, 419, 459, 541, 553, 599, 883, 971, 981, 1081, 1107, 1201, 1351, 1363, 2011, 2321, 2347, 2563, 2607, 2679, 2703, 2861, 2869, 2909, 2959, 3033, 3067, 3177, 3333, 3403, 3437, 3461, 3471, 3513, 3601, 3647, 3769, 3821, 3833 (list; graph; listen)

	OFFSET	`0,1`
	EXAMPLE	`E.g. a(1)=7 -> 111{2}=21{3}=13{4}=12{5}=11{6}=10{7}=7{8}=7{9}=7{10} -> 1112113121110777 is a prime.`
	CROSSREFS	`Cf. A054257, A054258.` `Sequence in context: A034577 A141291 A089106 this_sequence A085636 A064306 A001795` `Adjacent sequences: A054253 A054254 A054255 this_sequence A054257 A054258 A054259`
	KEYWORD	`nonn,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Feb 15 2000.`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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