A175935
Number of lattice paths from (0,0) to (n,n) using steps S={(k,0),(0,k),(r,r)|0
1, 2, 10, 55, 351, 2401, 17248, 128221, 978082, 7612155, 60204488, 482481220, 3909460725, 31974923487, 263623879118, 2188682538746, 18282238300443, 153537981720402, 1295640515428649, 10980400434511117, 93418283866708579
Offset: 0