A274404 - cp's OEIS frontend

A274404 Number T(n,k) of modified skew Dyck paths of semilength n with exactly k anti-down steps; triangle T(n,k), n>=0, 0<=k<=n-floor((1+sqrt(max(0,8n-7)))/2), read by rows.

n	a(n)
0	1
1	1
2	2
3	5
4	1
5	14
6	6
7	42
8	28
9	3
10	132
11	120
12	28
13	1
14	429
15	495
16	180
17	20
18	1430
19	2002
20	990
21	195
22	10
23	4862
24	8008
25	5005
26	1430
27	165
28	4
29	16796
30	31824
31	24024
32	9009
33	1650
34	117
35	1
36	58786
37	125970
38	111384
39	51688
40	13013
41	1617
42	70
43	208012
44	497420
45	503880
46	278460
47	89180
48	16016
49	1386
50	35

[1, 1, 2, 5, 1, 14, 6, 42, 28, 3, 132, 120, 28, 1, 429, 495, 180, 20, 1430, 2002, 990, 195, 10, 4862, 8008, 5005, 1430, 165, 4, 16796, 31824, 24024, 9009, 1650, 117, 1, 58786, 125970, 111384, 51688, 13013, 1617, 70, 208012, 497420, 503880, 278460, 89180, 16016, 1386, 35]

cp's OEIS Frontend

A274404 Number T(n,k) of modified skew Dyck paths of semilength n with exactly k anti-down steps; triangle T(n,k), n>=0, 0<=k<=n-floor((1+sqrt(max(0,8n-7)))/2), read by rows.

Table of values

List of values