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%I #9 Mar 22 2023 17:53:44
%S 3,300,3003,3403,3444000,344334403,433430403,3434340003,4033034303403,
%T 3430000044444403,4333004330434300,300034434334030003,
%U 333343033034040030,44400033434030304430,3340004334430334340000,30340003004344033440000,4430044300033330340443003
%N Triangular numbers composed of digits {0,3,4}.
%H Giovanni Resta, <a href="http://www.numbersaplenty.com/tr/tr034.html">Tridigital Triangular Numbers</a>
%F a(n) = A000217(A119060(n)). - _Michel Marcus_, Mar 22 2023
%Y Cf. A000217, A058430, A119060. See A119033 for a table of cross-references.
%K nonn,base
%O 1,1
%A _Giovanni Resta_, May 10 2006
%E a(16)-a(17) from _Tyler Busby_, Mar 22 2023
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