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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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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; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| 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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LINKS
| Pierre CAMI, Table of n, a(n) for n = 1..5058
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FORMULA
| Select primes having digits 1, 3, 7, 9 only.
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CROSSREFS
| A091871 gives prime index.
Sequence in context: A020598 A023236 A038920 * A177193 A089690 A020574
Adjacent sequences: A091630 A091631 A091632 * A091634 A091635 A091636
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KEYWORD
| easy,nonn,base
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AUTHOR
| Enoch Haga (Enokh(AT)comcast.net), Jan 26 2004
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