Expansion of tan(sinh(x)-sin(x)) = 2/3!x^3 + 2/7!x^7 + 4480/9!x^9 + 2/11!x^11 + ...

A013371

Expansion of tan(sinh(x)-sin(x)) = 2/3!*x^3 + 2/7!*x^7 + 4480/9!*x^9 + 2/11!*x^11 + ...

Terms

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a(9) =

External references

oeis: A013371