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Search: id:A091633
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| A091633 |
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Primes whose digits are restricted to 1,3,7,9 (same as terminal digits of primes). |
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+0
2
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| 3, 7, 11, 13, 17, 19, 31, 37, 71, 73, 79, 97, 113, 131, 137, 139, 173, 179, 191, 193, 197, 199, 311, 313, 317, 331, 337, 373, 379, 397, 719, 733, 739, 773, 797, 911, 919, 937, 971, 977, 991, 997, 1117, 1171, 1193, 1319, 1373, 1399, 1733, 1777, 1913, 1931, 1933
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Some primes of sufficient length might be termed DNA primes if the sequence of digits 1,3,7,9 in any order happens to be an appropriate analogue of the DNA bases A, G, C, T. It would be interesting to know if it is possible for any DNA sequence to match a DNA prime.
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FORMULA
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Select primes having digits 1, 3, 7, 9 only.
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CROSSREFS
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A091871 gives prime index.
Sequence in context: A020598 A023236 A038920 this_sequence A089690 A020574 A020618
Adjacent sequences: A091630 A091631 A091632 this_sequence A091634 A091635 A091636
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KEYWORD
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easy,nonn,base
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AUTHOR
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Enoch Haga (Enokh(AT)comcast.net), Jan 26 2004
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