OFFSET
0,1
COMMENTS
The map which is applied to primes in A171034.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
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)
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
M. F. Hasler, Feb 12 2013
STATUS
approved