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Table 1 Values of \(\zeta (2n)\)

From: An improvement of the Lyapunov inequality for certain higher order differential equations

n

1

2

3

4

5

6

ζ(2n)

\(\frac{\pi ^{2}}{6}\)

\(\frac{\pi ^{4}}{90}\)

\(\frac{\pi ^{6}}{945}\)

\(\frac{\pi ^{8}}{9450}\)

\(\frac{\pi ^{10}}{93{,}555}\)

\(\frac{691 \pi ^{12}}{638{,}512{,}875}\)