A145431 - OEIS

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A145431

Decimal expansion of Sum_{n>=1} n^3/binomial(2n,n).

4, 9, 9, 0, 3, 8, 4, 6, 0, 4, 3, 6, 2, 1, 2, 4, 9, 4, 9, 9, 2, 5, 4, 5, 4, 2, 1, 0, 6, 8, 5, 4, 2, 6, 2, 2, 4, 5, 5, 5, 8, 1, 3, 6, 0, 9, 3, 6, 8, 6, 7, 6, 5, 7, 5, 2, 1, 1, 9, 9, 3, 6, 4, 4, 6, 7, 5, 5, 6, 9, 3, 2, 5, 9, 6, 7, 2, 8, 6, 2, 6, 4, 1, 0, 6, 4, 8, 4, 5, 5, 7, 1, 3

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OFFSET

1,1

REFERENCES

Alexander Apelblat, Tables of Integrals and Series, Harri Deutsch, 1996, 4.1.37.

LINKS

Table of n, a(n) for n=1..93.

FORMULA

Equals (2/243)*(405+37*Pi*sqrt(3)).

EXAMPLE

4.990384604362124...

MAPLE