A114627 - cp's OEIS frontend

A114627 Number of hill-free Dyck paths of semilength n+3 and having no peaks at level 2 (a Dyck path is said to be hill-free if it has no peaks at level 1).

n	a(n)
0	1
1	2
2	6
3	19
4	61
5	202
6	683
7	2348
8	8184
9	28855
10	102731
11	368813
12	1333684
13	4853436
14	17761181
15	65320691
16	241300829
17	894958140
18	3331323651
19	12441078958
20	46601721324
21	175040968111
22	659136721385
23	2487852579751
24	9410480922018

[1, 2, 6, 19, 61, 202, 683, 2348, 8184, 28855, 102731, 368813, 1333684, 4853436, 17761181, 65320691, 241300829, 894958140, 3331323651, 12441078958, 46601721324, 175040968111, 659136721385, 2487852579751, 9410480922018]

cp's OEIS Frontend

A114627 Number of hill-free Dyck paths of semilength n+3 and having no peaks at level 2 (a Dyck path is said to be hill-free if it has no peaks at level 1).

Table of values

List of values