A175900
Number of lattice paths from (0,0) to (n,n) using steps S={(k,0),(0,k),(1,1)|0
1, 2, 9, 57, 411, 3150, 25274, 209719, 1784909, 15495058, 136672624, 1221370092, 11034687854, 100623850938, 924917387599, 8560734224711, 79717622732369, 746322905220237, 7020573752016609, 66324819580927731, 629004053328092981
Offset: 0