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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 (list; graph; refs; listen; history; text; internal format)
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^(#n-i), !n*d[1]) \\ N.B.: digits(0)=[] in PARI (v.2.6)

CROSSREFS

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

Sequence in context: A336321 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

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Last modified September 19 08:54 EDT 2021. Contains 347556 sequences. (Running on oeis4.)