135460

Appears in sequences

• Triangular numbers whose sum of divisors is also a triangular number.at n=5A083674
• Structured truncated cubic numbers.at n=29A100152
• a(n) = p*(p-1)/2, where p is A000043(n).at n=12A139116
• Triangular numbers which have one or more occurrences of exactly six different digits.at n=10A241789
• Numbers m such that m - 3 divides m^m + 3.at n=32A252041
• Numbers k such that the symmetric representation of sigma(k) has only two parts and they meet at the center of the Dyck path.at n=26A262259