A110122 - cp's OEIS frontend

A110122 Number of Delannoy paths of length n with no EE's crossing the line y = x (i.e., no two consecutive E steps from the line y = x+1 to the line y = x-1).

n	a(n)
0	1
1	3
2	12
3	53
4	247
5	1192
6	5897
7	29723
8	152020
9	786733
10	4111295
11	21661168
12	114925697
13	613442227
14	3291704108
15	17745496453
16	96062011319
17	521943400056
18	2845404909129
19	15558847792747
20	85311186002036
21	468951179698653
22	2583765541267647
23	14266052382826208

[1, 3, 12, 53, 247, 1192, 5897, 29723, 152020, 786733, 4111295, 21661168, 114925697, 613442227, 3291704108, 17745496453, 96062011319, 521943400056, 2845404909129, 15558847792747, 85311186002036, 468951179698653, 2583765541267647, 14266052382826208]

cp's OEIS Frontend

A110122 Number of Delannoy paths of length n with no EE's crossing the line y = x (i.e., no two consecutive E steps from the line y = x+1 to the line y = x-1).

Table of values

List of values