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A222229
In the number n, replace all (decimal) digits '2' with '5' and vice versa.
1
0, 1, 5, 3, 4, 2, 6, 7, 8, 9, 10, 11, 15, 13, 14, 12, 16, 17, 18, 19, 50, 51, 55, 53, 54, 52, 56, 57, 58, 59, 30, 31, 35, 33, 34, 32, 36, 37, 38, 39, 40, 41, 45, 43, 44, 42, 46, 47, 48, 49, 20, 21, 25, 23, 24, 22, 26, 27, 28, 29, 60, 61, 65, 63, 64, 62, 66, 67
OFFSET
0,3
COMMENTS
The map which is applied to primes in A171025.
LINKS
MATHEMATICA
a[n_]:= IntegerDigits[n]/.{2->5, 5->2} // FromDigits; Table[a[n], {n, 0, 80} (* Vincenzo Librandi, Jul 30 2013 *)
PROG
(PARI) A222229(n, d=[0, 1, 5, 3, 4, 2, 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,base,easy
AUTHOR
M. F. Hasler, Feb 12 2013
STATUS
approved