A175935 - cp's OEIS frontend

A175935 Number of lattice paths from (0,0) to (n,n) using steps S={(k,0),(0,k),(r,r)|0 which never go above the line y=x.

n	a(n)
0	1
1	2
2	10
3	55
4	351
5	2401
6	17248
7	128221
8	978082
9	7612155
10	60204488
11	482481220
12	3909460725
13	31974923487
14	263623879118
15	2188682538746
16	18282238300443
17	153537981720402
18	1295640515428649
19	10980400434511117
20	93418283866708579

[1, 2, 10, 55, 351, 2401, 17248, 128221, 978082, 7612155, 60204488, 482481220, 3909460725, 31974923487, 263623879118, 2188682538746, 18282238300443, 153537981720402, 1295640515428649, 10980400434511117, 93418283866708579]

cp's OEIS Frontend

A175935 Number of lattice paths from (0,0) to (n,n) using steps S={(k,0),(0,k),(r,r)|0 which never go above the line y=x.

Table of values

List of values