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A222216
In the number n, replace all (decimal) digits 0 with 7 and vice versa.
1
7, 1, 2, 3, 4, 5, 6, 0, 8, 9, 17, 11, 12, 13, 14, 15, 16, 10, 18, 19, 27, 21, 22, 23, 24, 25, 26, 20, 28, 29, 37, 31, 32, 33, 34, 35, 36, 30, 38, 39, 47, 41, 42, 43, 44, 45, 46, 40, 48, 49, 57, 51, 52, 53, 54, 55, 56, 50, 58, 59, 67, 61, 62, 63, 64, 65, 66, 60, 68, 69, 7, 1, 2, 3, 4, 5
OFFSET
0,1
COMMENTS
The map which is applied to primes in A171034.
LINKS
MAPLE
A222216 := proc(n)
if n = 0 then
7;
else
dgs := convert(n, base, 10) ;
dgs := [seq( subs({0=7, 7=0}, op(d, dgs)), d=1..nops(dgs))] ;
add(op(d, dgs)*10^(d-1), d=1..nops(dgs)) ;
end if;
end proc: # R. J. Mathar, Feb 15 2013
MATHEMATICA
a[n_]:= IntegerDigits[n]/.{0->7, 7->0} // FromDigits; Table[a[n], {n, 0, 80}] (* Vincenzo Librandi, Jul 29 2013 *)
PROG
(PARI) A222216(n, d=[7, 1, 2, 3, 4, 5, 6, 0, 8, 9])={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 12 2013
STATUS
approved