A109979 - cp's OEIS frontend

A109979 Triangle read by rows: T(n,k) (0<=k<=n) is the number of Delannoy paths of length n, having k (1,1)-steps on the line y=x (a Delannoy path of length n is a path from (0,0) to (n,n), consisting of steps (E=1,0), N=(0,1) and D(1,1)).

n	a(n)
0	1
1	2
2	1
3	8
4	4
5	1
6	36
7	20
8	6
9	1
10	172
11	104
12	36
13	8
14	1
15	852
16	552
17	212
18	56
19	10
20	1
21	4324
22	2968
23	1236
24	368
25	80
26	12
27	1
28	22332
29	16104
30	7164
31	2336
32	580
33	108
34	14
35	1
36	116876
37	87976
38	41372
39	14512
40	3980
41	856
42	140
43	16
44	1
45	618084
46	483192
47	238356
48	88848
49	26372
50	6312
51	1204
52	176

[1, 2, 1, 8, 4, 1, 36, 20, 6, 1, 172, 104, 36, 8, 1, 852, 552, 212, 56, 10, 1, 4324, 2968, 1236, 368, 80, 12, 1, 22332, 16104, 7164, 2336, 580, 108, 14, 1, 116876, 87976, 41372, 14512, 3980, 856, 140, 16, 1, 618084, 483192, 238356, 88848, 26372, 6312, 1204, 176]

cp's OEIS Frontend

A109979 Triangle read by rows: T(n,k) (0<=k<=n) is the number of Delannoy paths of length n, having k (1,1)-steps on the line y=x (a Delannoy path of length n is a path from (0,0) to (n,n), consisting of steps (E=1,0), N=(0,1) and D(1,1)).

Table of values

List of values