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A118555 Lucky numbers for which the sum of the digits is also a lucky number. 1

%I

%S 1,3,7,9,21,25,43,49,63,67,69,87,111,115,133,135,151,159,171,193,195,

%T 201,205,223,241,261,267,283,285,319,331,339,357,391,393,399,409,421,

%U 427,429,463,483,489,511,517,519,535,537,553,579,591,601,621,643,645

%N Lucky numbers for which the sum of the digits is also a lucky number.

%H Amiram Eldar, <a href="/A118555/b118555.txt">Table of n, a(n) for n = 1..10000</a>

%e 49 is in the sequence because (1) it is a lucky number and (2) the sum of its digits 4+9=13 is also a lucky number.

%Y Cf. A000959, A007953.

%K base,nonn

%O 1,2

%A Luc Stevens (lms022(AT)yahoo.com), May 07 2006

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Last modified September 25 18:27 EDT 2022. Contains 356986 sequences. (Running on oeis4.)