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A222232
In the number n, replace all (decimal) digits '2' with '8' and vice versa.
1
0, 1, 8, 3, 4, 5, 6, 7, 2, 9, 10, 11, 18, 13, 14, 15, 16, 17, 12, 19, 80, 81, 88, 83, 84, 85, 86, 87, 82, 89, 30, 31, 38, 33, 34, 35, 36, 37, 32, 39, 40, 41, 48, 43, 44, 45, 46, 47, 42, 49, 50, 51, 58, 53, 54, 55, 56, 57, 52, 59, 60, 61, 68, 63, 64, 65, 66, 67, 62, 69
OFFSET
0,3
COMMENTS
The map which is applied to primes in A171043.
LINKS
MATHEMATICA
a[n_]:= IntegerDigits[n]/.{2->8, 8->2} // FromDigits; Table[a[n], {n, 0, 80}] (* Vincenzo Librandi, Jul 30 2013 *)
PROG
(PARI) A222232(n, d=[0, 1, 8, 3, 4, 5, 6, 7, 2, 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