@mathzorro: https://arxiv.org/abs/1610.02965 "A q-analog of Schläfli and Gould identities on Stirling numbers", for lattice-paths reasons
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@mathzorro: https://arxiv.org/abs/1610.02965 "A q-analog of Schläfli and Gould identities on Stirling numbers", for lattice-paths reasons