id:A094298 - OEIS Search Results

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Numbers n such that n and its 10's complement are both semiprimes, i.e. n and 10^k - n where k is the number of digits of n, are semiprime.

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4, 6, 14, 15, 26, 35, 38, 49, 51, 62, 65, 74, 85, 86, 91, 94, 111, 121, 122, 129, 134, 158, 159, 169, 183, 185, 187, 201, 206, 209, 215, 219, 221, 237, 247, 254, 287, 301, 302, 303, 305, 319, 321, 326, 329, 365, 371, 377, 386, 403, 411, 417, 427, 446, 447, 458 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`201 is a term because 201 and 1000-201 = 799 are semiprimes.`
	CROSSREFS	`Cf. A001358.` `Sequence in context: A016072 A095867 A034759 this_sequence A089226 A102029 A029641` `Adjacent sequences: A094295 A094296 A094297 this_sequence A094299 A094300 A094301`
	KEYWORD	`easy,nonn,base`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Jun 02 2004`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

AT&T Labs Research