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A222239
In the number n, replace all (decimal) digits '3' with '9' and vice versa.
1
0, 1, 2, 9, 4, 5, 6, 7, 8, 3, 10, 11, 12, 19, 14, 15, 16, 17, 18, 13, 20, 21, 22, 29, 24, 25, 26, 27, 28, 23, 90, 91, 92, 99, 94, 95, 96, 97, 98, 93, 40, 41, 42, 49, 44, 45, 46, 47, 48, 43, 50, 51, 52, 59, 54, 55, 56, 57, 58, 53, 60, 61, 62, 69, 64, 65, 66, 67, 68, 63, 70, 71, 72, 79, 74, 75
OFFSET
0,3
COMMENTS
The map which is applied to primes in A171052.
LINKS
MATHEMATICA
a[n_]:= IntegerDigits[n]/.{3->9, 9->3} // FromDigits; Table[a[n], {n, 0, 80}] (* Vincenzo Librandi, Jul 30 2013 *)
PROG
(PARI) A222239(n, d=[0, 1, 2, 9, 4, 5, 6, 7, 8, 3])=sum(i=1, #n=digits(n), d[n[i]+1]*10^(#n-i)) \\ gives correct result for n=0 iff d[1]=0, since digits(0)=[] in PARI (v.2.6)
KEYWORD
nonn,base,easy
AUTHOR
M. F. Hasler, Feb 13 2013
STATUS
approved