id:A036976 - OEIS Search Results

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Becomes a prime if a 1 is inserted before each digit.

+0
2

1, 3, 7, 9, 17, 23, 27, 39, 51, 63, 69, 81, 93, 119, 121, 127, 137, 161, 193, 199, 203, 209, 233, 271, 301, 311, 313, 323, 331, 337, 343, 359, 361, 367, 371, 373, 431, 439, 443, 451, 463, 469, 479, 481, 497, 503, 523, 557, 577, 583, 587, 607, 641, 661, 677 (list; graph; listen)

	OFFSET	`0,2`
	EXAMPLE	`E.g. 27 -> 1217 is prime.`
	CROSSREFS	`Cf. A036977.` `Adjacent sequences: A036973 A036974 A036975 this_sequence A036977 A036978 A036979` `Sequence in context: A064194 A036978 A079464 this_sequence A031273 A140118 A110674`
	KEYWORD	`nonn,base,easy`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`
	EXTENSIONS	`More terms from Erich Friedman (erich.friedman(AT)stetson.edu).`

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Last modified November 8 20:39 EST 2009. Contains 166234 sequences.

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