Formula:8501

Digital Library of Mathematical Functions ID 26.6.E6

${\displaystyle{\displaystyle\sum_{n=0}^{\infty}D(n,n)x^{n}=\frac{1}{\sqrt{1-6x+x^{2}}},}}$

Symbols List

• ${\displaystyle{\displaystyle n}}$: nonnegative integer
• ${\displaystyle{\displaystyle D(m,n)}}$: Delannoy number (locally)
• ${\displaystyle{\displaystyle x}}$: small
 

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