id:A020465 - OEIS Search Results

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A020465

Primes that contain digits 4 and 7 only.

+0
2

7, 47, 4447, 7477, 44777, 47777, 74747, 77447, 77477, 77747, 4444747, 4447747, 4747747, 4774477, 4774747, 7444477, 7447777, 7474477, 7477777, 7747477, 7774777, 7777447, 44447747, 44747447, 44747777, 44774777, 47447747, 47774477, 47774747 (list; graph; listen)

	OFFSET	`1,1`
	CROSSREFS	`Adjacent sequences: A020462 A020463 A020464 this_sequence A020466 A020467 A020468` `Sequence in context: A013399 A013403 A013401 this_sequence A092480 A088143 A124880`
	KEYWORD	`nonn,base`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified October 5 16:50 EDT 2008. Contains 144613 sequences.

AT&T Labs Research