105111

Appears in sequences

• Smallest triangular number containing exactly n 1's.at n=3A036518
• Number of dissimilar ternary squarefree words of length n+1.at n=39A060688
• Smallest triangular number whose final digits are A068125(n).at n=50A068126
• Triangular numbers whose sum of divisors is also a triangular number.at n=4A083674
• Triangular numbers m such that A040115(m) is also triangular.at n=28A087597
• Smallest nonzero n-digit term of A087597, or 0 if no such number exists.at n=5A087599
• The Roman numerals, with "i" replaced by "1", "v" replaced by "5", "x" replaced by 10, etc.at n=17A093788
• Triangular numbers for which the sum of the digits is a square.at n=26A117404
• Triangular numbers composed of digits {0,1,5}.at n=9A119039
• Smallest triangular number ending in n ones.at n=2A227218
• Number of Tom graphs with n vertices.at n=17A331693
• Triangular numbers whose sum of digits is 9.at n=21A375824