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Fungrim entry: 483547

\pi = \sum_{n=1}^{\infty} \text{A000796}\!\left(n\right) {10}^{1 - n}

References:

Sequence A000796 in Sloane's On-Line Encyclopedia of Integer Sequences (OEIS)

TeX:

\pi = \sum_{n=1}^{\infty} \text{A000796}\!\left(n\right) {10}^{1 - n}

Definitions:

Fungrim symbol	Notation	Short description
`Pi`	$\pi$	The constant pi (3.14...)
`Sum`	$\sum_{n} f(n)$	Sum
`SloaneA`	$\text{A00000X}\!\left(n\right)$	Sequence X in Sloane's OEIS
`Pow`	${a}^{b}$	Power
`Infinity`	$\infty$	Positive infinity

Source code for this entry:

Entry(ID("483547"),
    Formula(Equal(Pi, Sum(Mul(SloaneA("A000796", n), Pow(10, Sub(1, n))), For(n, 1, Infinity)))))

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2021-03-15 19:12:00.328586 UTC