OFFSET
0,3
COMMENTS
The map which is applied to primes in A171055.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
MATHEMATICA
a[n_]:= IntegerDigits[n]/.{6->9, 9->6} // FromDigits; Table[a[n], {n, 0, 80}] (* Vincenzo Librandi, Jul 31 2013 *)
PROG
(PARI) A222251(n, d=[0, 1, 2, 3, 4, 5, 9, 7, 8, 6])=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)
(Python)
def flp69(s): return s.replace("6", "-").replace("9", "6").replace("-", "9")
def aupto(lim): return [int(flp69(s)) for s in map(str, range(lim+1))]
print(aupto(75)) # Michael S. Branicky, Sep 07 2021
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
M. F. Hasler, Feb 13 2013
STATUS
approved