File size: 432 Bytes
848d4b7 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | from mpmath import mp
mp.dps = 110
def compute():
# MRB constant: M = sum_{n=1}^{infty} (-1)^n (n^{1/n} - 1)
# OEIS A037077: 0.18785964246206712024851793405427...
# Using mpmath's nsum with built-in convergence acceleration.
with mp.extradps(30):
return mp.nsum(
lambda n: (-1) ** n * (mp.power(n, mp.one / n) - 1), [1, mp.inf]
)
if __name__ == "__main__":
print(str(compute()))
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