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A222224 In the number n, replace all (decimal) digits '1' with '7' and vice versa. 1
0, 7, 2, 3, 4, 5, 6, 1, 8, 9, 70, 77, 72, 73, 74, 75, 76, 71, 78, 79, 20, 27, 22, 23, 24, 25, 26, 21, 28, 29, 30, 37, 32, 33, 34, 35, 36, 31, 38, 39, 40, 47, 42, 43, 44, 45, 46, 41, 48, 49, 50, 57, 52, 53, 54, 55, 56, 51, 58, 59, 60, 67, 62, 63, 64, 65, 66, 61, 68, 69, 10, 17, 12, 13, 14, 15 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

The map which is applied to primes in A171035.

LINKS

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

MATHEMATICA

a[n_]:= IntegerDigits[n]/.{1->7, 7->1} // FromDigits; Table[a[n], {n, 0, 80}] (* Vincenzo Librandi, Jul 29 2013 *)

PROG

(PARI) A222224(n, d=[0, 7, 2, 3, 4, 5, 6, 1, 8, 9])=sum(i=1, #n=digits(n), d[n[i]+1]*10^(#n-i)) \\ gives correct value for n=0 iff d[1]=0, since digits(0)=[] in PARI (v.2.6)

CROSSREFS

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

Sequence in context: A291361 A198607 A021857 * A163333 A116369 A155751

Adjacent sequences:  A222221 A222222 A222223 * A222225 A222226 A222227

KEYWORD

nonn,base,easy

AUTHOR

M. F. Hasler, Feb 12 2013

STATUS

approved

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Last modified September 26 15:53 EDT 2021. Contains 347668 sequences. (Running on oeis4.)