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A171027
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In the sequence of prime numbers, replace all the '5' digits with '4' and vice versa.
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3
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2, 3, 4, 7, 11, 13, 17, 19, 23, 29, 31, 37, 51, 53, 57, 43, 49, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 159, 141, 147, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 251, 241, 247, 263
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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FromDigits[IntegerDigits[#]/.{5->p, 4->q}/.{p->4, q->5}]&/@Prime[Range[100]] (* Vincenzo Librandi, Apr 07 2013 *)
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PROG
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(PARI) a(n)=my(v=[0, 1, 2, 3, 5, 4, 6, 7, 8, 9]); subst(Pol(apply(k->v[k+1], digits(prime(n)))), 'x, 10) \\ Charles R Greathouse IV, Jul 24 2013
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CROSSREFS
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KEYWORD
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nonn,base,easy
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AUTHOR
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STATUS
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approved
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