339900

Appears in sequences

• Triangular numbers using only the curved digits 0, 3, 6, 8 and 9.at n=21A079653
• Triangular numbers whose representation is made of nontrivial runs of identical digits.at n=5A116055
• Triangular numbers composed of digits {0,3,9}.at n=7A119069
• Triangular numbers n such that each decimal digit of n is equal to the difference of at least two other digits of n.at n=24A255917
• The numbers appearing in the first layer of the number stack in A370193.at n=21A374496