55484

Appears in sequences

• Fibonacci sequence beginning 4, 19.at n=18A022135
• Numbers k such that the k-th triangular number contains each of the 10 decimal digits exactly once.at n=4A115939
• Expansion of (1/x) * Series_Reversion( x * (1 - x^3 / (1 - x)^2) ).at n=15A389348