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A119069 Triangular numbers composed of digits {0,3,9}. 2

%I

%S 3,300,903,990,3003,33930,39903,339900,930930,39033030,990903903,

%T 3909003990,3993990000,33003300903,39999939903,90993993300,

%U 3390003090090,99990099000330,90009933903093903,399939399933939330

%N Triangular numbers composed of digits {0,3,9}.

%H G. Resta, <a href="http://www.numbersaplenty.com/tr/tr039.html">Tridigital Triangular Numbers</a>

%Y Cf. A000217, A058434, A119070. See A119033 for a table of cross-references.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, May 10 2006

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Last modified May 28 07:30 EDT 2022. Contains 354112 sequences. (Running on oeis4.)