id:A046422 - OEIS Search Results

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2 steps needed to reach a prime under prime factor concatenation procedure.

+0
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4, 9, 24, 30, 32, 36, 38, 42, 50, 55, 57, 60, 68, 74, 75, 88, 92, 94, 99, 102, 106, 108, 110, 122, 134, 140, 155, 158, 174, 194, 206, 209, 215, 231, 244, 254, 272, 280, 287, 298, 299, 306, 314, 323, 332, 334, 346, 351, 362, 365, 371, 374, 398, 413, 415, 417 (list; graph; listen)

	OFFSET	`0,1`
	LINKS	`P. De Geest, Home Primes`
	EXAMPLE	`38 = 219 -> 219 = 373 and 373 is prime.`
	CROSSREFS	`Cf. A037271, A046411.` `Sequence in context: A027119 A067801 A062775 this_sequence A056575 A056032 A127979` `Adjacent sequences: A046419 A046420 A046421 this_sequence A046423 A046424 A046425`
	KEYWORD	`nonn`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Jun 15 1998.`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research