

A222246


In the number n, replace all (decimal) digits '5' with '7' and vice versa.


1



0, 1, 2, 3, 4, 7, 6, 5, 8, 9, 10, 11, 12, 13, 14, 17, 16, 15, 18, 19, 20, 21, 22, 23, 24, 27, 26, 25, 28, 29, 30, 31, 32, 33, 34, 37, 36, 35, 38, 39, 40, 41, 42, 43, 44, 47, 46, 45, 48, 49, 70, 71, 72, 73, 74, 77, 76, 75, 78, 79, 60, 61, 62, 63, 64, 67, 66, 65, 68, 69, 50, 51, 52, 53, 54, 57
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OFFSET

0,3


COMMENTS

The map which is applied to primes in A171039.


LINKS

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


MATHEMATICA

a[n_]:= IntegerDigits[n]/.{5>7, 7>5} // FromDigits; Table[a[n], {n, 0, 80}] (* Vincenzo Librandi, Jul 31 2013 *)


PROG

(PARI) A222246(n, d=[0, 1, 2, 3, 4, 7, 6, 5, 8, 9])=sum(i=1, #n=digits(n), d[n[i]+1]*10^(#ni), !n*d[1]) \\ N.B.: digits(0)=[] in PARI (v.2.6)


CROSSREFS

Cf. A222210A222254; A171013A171016, A175770, A171018A171057.
Sequence in context: A273014 A072275 A122989 * A321726 A267299 A077223
Adjacent sequences: A222243 A222244 A222245 * A222247 A222248 A222249


KEYWORD

nonn,base,easy


AUTHOR

M. F. Hasler, Feb 13 2013


STATUS

approved



