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A171037
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In the sequence of prime numbers, replace all the '7' digits with '3' and vice versa.
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3
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2, 7, 5, 3, 11, 17, 13, 19, 27, 29, 71, 73, 41, 47, 43, 57, 59, 61, 63, 31, 37, 39, 87, 89, 93, 101, 107, 103, 109, 117, 123, 171, 173, 179, 149, 151, 153, 167, 163, 137, 139, 181, 191, 197, 193, 199, 211, 227, 223, 229, 277, 279, 241, 251, 253, 267
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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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pq[n_]:=Module[{idn=IntegerDigits[n]}, FromDigits[idn/.{7->p, 3->q}/.{p->3, q->7}]]; pq/@Prime[Range[60]] (* Harvey P. Dale, Dec 11 2012 *)
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PROG
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(PARI) a(n)=my(v=[0, 1, 2, 7, 4, 5, 6, 3, 8, 9]); subst(Pol(apply(k->v[k+1], digits(prime(n)))), 'x, 10) \\ Charles R Greathouse IV, Jul 25 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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