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A222220
In the number n, replace all (decimal) digits '1' with '3' and vice versa.
1
0, 3, 2, 1, 4, 5, 6, 7, 8, 9, 30, 33, 32, 31, 34, 35, 36, 37, 38, 39, 20, 23, 22, 21, 24, 25, 26, 27, 28, 29, 10, 13, 12, 11, 14, 15, 16, 17, 18, 19, 40, 43, 42, 41, 44, 45, 46, 47, 48, 49, 50, 53, 52, 51, 54, 55, 56, 57, 58, 59, 60, 63, 62, 61, 64, 65, 66, 67, 68, 69, 70, 73, 72, 71, 74, 75
OFFSET
0,2
COMMENTS
The map which is applied to primes in A175770.
LINKS
MATHEMATICA
a[n_]:= IntegerDigits[n]/.{1->3, 3->1} // FromDigits; Table[a[n], {n, 0, 80}] (* Vincenzo Librandi, Jul 29 2013 *)
PROG
(PARI) A222220(n, d=[0, 3, 2, 1, 4, 5, 6, 7, 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)
KEYWORD
nonn,easy,base
AUTHOR
M. F. Hasler, Feb 12 2013
STATUS
approved