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A004721 Delete all 2's from the sequence of nonnegative integers. 2
0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1, 13, 14, 15, 16, 17, 18, 19, 0, 1, 3, 4, 5, 6, 7, 8, 9, 30, 31, 3, 33, 34, 35, 36, 37, 38, 39, 40, 41, 4, 43, 44, 45, 46, 47, 48, 49, 50, 51, 5, 53, 54, 55, 56, 57, 58, 59, 60, 61, 6, 63, 64, 65, 66, 67, 68, 69, 70, 71, 7, 73, 74, 75 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..73.

MATHEMATICA

d[n_]:=IntegerDigits[n]; t={0}; Do[If[Union[d[n]]!={2}, n=FromDigits[DeleteCases[d[n], 2]]; AppendTo[t, n]], {n, 75}]; t (* Jayanta Basu, May 17 2013 *)

CROSSREFS

Sequence in context: A154781 A118716 A004177 * A030544 A141213 A171950

Adjacent sequences:  A004718 A004719 A004720 * A004722 A004723 A004724

KEYWORD

base,nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified March 20 20:14 EDT 2019. Contains 321352 sequences. (Running on oeis4.)