|
%I #8 Nov 18 2019 03:21:13
%S 1,3,7,9,13,31,33,37,73,79,111,133,135,171,331,357,535,537,553,717,
%T 735,739,937,1117,1155,1179,1197,1357,1395,1711,1731,1771,3111,3171,
%U 3175,3571,3915,3951,3999,5137,5139,5151,5371,5377,5713,5737,5913,5997,7111
%N Lucky numbers for which the product of the digits is also a lucky number.
%H Amiram Eldar, <a href="/A118556/b118556.txt">Table of n, a(n) for n = 1..10000</a>
%e 79 is in the sequence because (1) it is a lucky number and (2) the product of its digits 7*9=63 is also a lucky number.
%Y Cf. A000959, A007954.
%K base,nonn
%O 1,2
%A Luc Stevens (lms022(AT)yahoo.com), May 07 2006
|
