OFFSET
0,4
LINKS
Michel Marcus, Table of n, a(n) for n = 0..5000
MATHEMATICA
Table[FromDigits[DeleteCases[IntegerDigits[n], 1 | 2]], {n, 300}]
PROG
(PARI) a(n) = fromdigits(select(x->((x!=1) && (x!=2)), digits(n))); \\ Michel Marcus, Sep 17 2017
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Zak Seidov, Dec 07 2010
STATUS
approved