447214

Appears in sequences

• a(n)/100000 gives sqrt(n) to 5 places after the decimal point.at n=19A027663
• a(n) is root of square starting with digit 2: first term of runs.at n=10A035069
• Index of smallest triangular number with n digits.at n=11A068092
• Triangular number index of A077206(n).at n=11A077207
• Number of triangular numbers <= 10^n.at n=11A236043