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Template:~Pochhammer~0/doc
From OeisWiki
The {{~Pochhammer~0}} auxiliary core function template is used to terminate the pseudo-recursion (since true recursion with templates is not allowed) for the core function {{~Pochhammer}} which implements a generalized Pochhammer function where the factors are incremented by the third argument value. The {{Pochhammer}} mathematical function template calls {{~Pochhammer}} using the value 1 for the third argument.
Cf. {{Pochhammer/doc}}.