A171054 -id:A171054 - cp's OEIS frontend

A180554 Primes that become a different prime under the mapping 5 <=> 9.

151, 157, 191, 197, 541, 547, 557, 571, 577, 593, 757, 797, 941, 947, 953, 971, 977, 997, 1051, 1091, 1153, 1193, 1453, 1493, 1531, 1553, 1657, 1697, 1931, 1993, 2503, 2593, 2857, 2897, 2903, 2953, 3511, 3517, 3547, 3911, 3917, 3947, 4051, 4091, 4357

Offset: 1

Zak Seidov and Robert G. Wilson v, Sep 09 2010

Robert Price, Table of n, a(n) for n = 1..1595
Index to Primes, Primes that become a different prime under some mapping.

Cf. A171054, A175791, A180517 thru A180559, A175789, A180560, A180561.

fQ[n_] := Block[{id = IntegerDigits@n}, (MemberQ[id, 5] || MemberQ[id, 9]) && PrimeQ[ FromDigits[ id /. {5 -> 9, 9 -> 5}] ]]; Select[ Prime@ Range@ 600, fQ]

A222248 In the number n, replace all (decimal) digits '5' with '9' and vice versa.

Original entry on oeis.org

0, 1, 2, 3, 4, 9, 6, 7, 8, 5, 10, 11, 12, 13, 14, 19, 16, 17, 18, 15, 20, 21, 22, 23, 24, 29, 26, 27, 28, 25, 30, 31, 32, 33, 34, 39, 36, 37, 38, 35, 40, 41, 42, 43, 44, 49, 46, 47, 48, 45, 90, 91, 92, 93, 94, 99, 96, 97, 98, 95, 60, 61, 62, 63, 64, 69, 66, 67, 68, 65, 70, 71, 72, 73, 74, 79

Offset: 0

M. F. Hasler, Feb 13 2013

The map which is applied to primes in A171054.

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Cf. A222210-A222254; A171013-A171016, A175770, A171018-A171057.

a[n_]:= IntegerDigits[n]/.{5->9, 9->5} // FromDigits; Table[a[n], {n, 0, 80}] (* Vincenzo Librandi, Jul 31 2013 *)

A222248(n,d=[0, 1, 2, 3, 4, 9, 6, 7, 8, 5])=sum(i=1,#n=digits(n),d[n[i]+1]*10^(#n-i),!n*d[1]) \\ N.B.: digits(0)=[] in PARI (v.2.6)

cp's OEIS Frontend

A180554 Primes that become a different prime under the mapping 5 <=> 9.

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