A175962 - cp's OEIS frontend

A175962 Number of lattice paths from (0,0) to (n,n) using steps S={(k,0),(0,k),(r,r)|k>0,r>0} which never go above the line y=x.

n	a(n)
0	1
1	2
2	10
3	63
4	454
5	3539
6	29008
7	246255
8	2145722
9	19078536
10	172402396
11	1578687082
12	14616730080
13	136606848093
14	1287022395324
15	12210382758519
16	116553763025178
17	1118580919711060
18	10786838228669692
19	104469304517331666
20	1015700422725526916

[1, 2, 10, 63, 454, 3539, 29008, 246255, 2145722, 19078536, 172402396, 1578687082, 14616730080, 136606848093, 1287022395324, 12210382758519, 116553763025178, 1118580919711060, 10786838228669692, 104469304517331666, 1015700422725526916]

cp's OEIS Frontend

A175962 Number of lattice paths from (0,0) to (n,n) using steps S={(k,0),(0,k),(r,r)|k>0,r>0} which never go above the line y=x.

Table of values

List of values