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Horizontally symmetric numbers.
(Formerly M4477)
4

%I M4477 #25 Apr 03 2020 04:06:20

%S 0,1,3,8,10,11,13,18,30,31,33,38,80,81,83,88,100,101,103,108,110,111,

%T 113,118,130,131,133,138,180,181,183,188,300,301,303,308,310,311,313,

%U 318,330,331,333,338,380,381,383,388,800,801,803,808,810,811,813,818

%N Horizontally symmetric numbers.

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%H Indranil Ghosh, <a href="/A007284/b007284.txt">Table of n, a(n) for n = 0..50000</a>

%F Numbers using only digits 0, 1, 3 and 8.

%o (Python)

%o allowed = ("0", "1", "3", "8")

%o def a(n):

%o return all(x in allowed for x in str(n))

%o print([i for i in range(50000) if a(i)])

%o # _Indranil Ghosh_, Feb 03 2017

%Y Cf. A046031.

%K nonn,easy,base

%O 0,3

%A _N. J. A. Sloane_.

%E More terms from _Henry Bottomley_, Feb 14 2000