A145429 - OEIS

A145429

Decimal expansion of Sum_{n > 0} n*(n!)^2/(2n)!.

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

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OFFSET

1,3

COMMENTS

Also, decimal expansion of Sum_{n >= 0} n/binomial(2*n, n). - Bruno Berselli, Sep 14 2015

REFERENCES

Alexander Apelblat, Tables of Integrals and Series, Harri Deutsch, (1996), 4.1.35.

LINKS

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

FORMULA

Equals 10*A021139*(9+A000796*A002194).

From Amiram Eldar, Nov 16 2021: (Start)