login
A222248
In the number n, replace all (decimal) digits '5' with '9' and vice versa.
1
0, 1, 2, 3, 4, 9, 6, 7, 8, 5, 10, 11, 12, 13, 14, 19, 16, 17, 18, 15, 20, 21, 22, 23, 24, 29, 26, 27, 28, 25, 30, 31, 32, 33, 34, 39, 36, 37, 38, 35, 40, 41, 42, 43, 44, 49, 46, 47, 48, 45, 90, 91, 92, 93, 94, 99, 96, 97, 98, 95, 60, 61, 62, 63, 64, 69, 66, 67, 68, 65, 70, 71, 72, 73, 74, 79
OFFSET
0,3
COMMENTS
The map which is applied to primes in A171054.
LINKS
MATHEMATICA
a[n_]:= IntegerDigits[n]/.{5->9, 9->5} // FromDigits; Table[a[n], {n, 0, 80}] (* Vincenzo Librandi, Jul 31 2013 *)
PROG
(PARI) A222248(n, d=[0, 1, 2, 3, 4, 9, 6, 7, 8, 5])=sum(i=1, #n=digits(n), d[n[i]+1]*10^(#n-i), !n*d[1]) \\ N.B.: digits(0)=[] in PARI (v.2.6)
KEYWORD
nonn,base,easy
AUTHOR
M. F. Hasler, Feb 13 2013
STATUS
approved