18660270

Appears in sequences

• Minimum number of terms required in the Gregory-Leibniz series, i.e., 4(1 - 1/3 + 1/5 - 1/7 + 1/9 - ...), to obtain a value of Pi correct to n decimal digits.at n=7A126809
• a(n) minimizes (over the integers) the absolute difference between Pi and x(n) + 1/a(n), where x(n) is Pi truncated at the n-th decimal digit.at n=7A286742