Central Delannoy Numbers
Generate the first central Delannoy numbers, which count the paths from (0,0) to (n,n) on a grid using east, north and northeast (diagonal) steps. The sequence starts 1, 3, 13, 63, 321, 1683 and relates to the Schröder numbers and lattice geometry.
Resultado
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Números de Delannoy centrais
Os números de Delannoy centrais contam os caminhos de (0,0) a (n,n) numa grade usando passos para o leste, norte e nordeste (diagonal). Começam 1, 3, 13, 63, 321, 1683. Diferente dos caminhos reticulares simples, eles permitem o passo diagonal, e relacionam-se com os números de Schröder, os polinômios de Legendre e problemas de geometria reticular.
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