id:A020471 - OEIS Search Results

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A020471

Primes that contain digits 7 and 9 only.

+0
2

7, 79, 97, 797, 977, 997, 77797, 77977, 77999, 79777, 79979, 79997, 79999, 97777, 777977, 777979, 779797, 797977, 799979, 799999, 999979, 7777997, 7779979, 7779997, 7797799, 7797997, 7799797, 7799999, 7977779, 7977797, 7977799, 7977997 (list; graph; listen)

	OFFSET	`1,1`
	CROSSREFS	`Sequence in context: A106110 A082992 A106107 this_sequence A065902 A140613 A139945` `Adjacent sequences: A020468 A020469 A020470 this_sequence A020472 A020473 A020474`
	KEYWORD	`nonn,base`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

AT&T Labs Research