A108444 - cp's OEIS frontend

A108444 Number of triple descents (i.e., ddd's) in all paths from (0,0) to (3n,0) that stay in the first quadrant (but may touch the horizontal axis), consisting of steps u=(2,1),U=(1,2), or d=(1,-1).

n	a(n)
2	5
3	73
4	857
5	9505
6	103341
7	1114969
8	11996209
9	128989249
10	1387480981
11	14937170089
12	160978217225
13	1736820843233
14	18760031574077
15	202856430706617
16	2195832009812065
17	23792481053343361
18	258038743598973477

[5, 73, 857, 9505, 103341, 1114969, 11996209, 128989249, 1387480981, 14937170089, 160978217225, 1736820843233, 18760031574077, 202856430706617, 2195832009812065, 23792481053343361, 258038743598973477]

cp's OEIS Frontend

A108444 Number of triple descents (i.e., ddd's) in all paths from (0,0) to (3n,0) that stay in the first quadrant (but may touch the horizontal axis), consisting of steps u=(2,1),U=(1,2), or d=(1,-1).

Table of values

List of values