|
%I #10 Jul 13 2021 07:32:12
%S 1,2,421,1541,8753,150421,12914246,1327696379533,4034385661121,
%T 605166395826533,16360402306368458,249752330575267378
%N Numbers k such that the k-th triangular number contains only digits {1,3,8}.
%C Next term exceeds 4.4*10^18.
%H G. Resta, <a href="http://www.numbersaplenty.com/tr/tr138.html">Tridigital Triangular Numbers</a>
%Y Cf. A000217, A119119. See A119034 for a table of cross-references.
%K nonn,base,more
%O 1,2
%A _Giovanni Resta_, May 10 2006
%E Two more terms from _Max Alekseyev_, May 12 2009
|
