A071946 - cp's OEIS frontend

A071946 Triangle T(n,k) read by rows giving number of underdiagonal lattice paths from (0,0) to (n,k) using only steps R = (1,0), V = (0,1) and D = (3,1).

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	1
7	4
8	6
9	6
10	1
11	6
12	13
13	19
14	19
15	1
16	8
17	23
18	44
19	63
20	63
21	1
22	10
23	37
24	87
25	156
26	219
27	219
28	1
29	12
30	55
31	155
32	330
33	568
34	787
35	787
36	1
37	14
38	77
39	255
40	629
41	1260
42	2110
43	2897
44	2897
45	1
46	16
47	103
48	395
49	1111
50	2527
51	4856
52	7972
53	10869
54	10869
55	1
56	18
57	133
58	583
59	1849
60	4706
61	10130
62	18889
63	30545
64	41414
65	41414

[1, 1, 1, 1, 2, 2, 1, 4, 6, 6, 1, 6, 13, 19, 19, 1, 8, 23, 44, 63, 63, 1, 10, 37, 87, 156, 219, 219, 1, 12, 55, 155, 330, 568, 787, 787, 1, 14, 77, 255, 629, 1260, 2110, 2897, 2897, 1, 16, 103, 395, 1111, 2527, 4856, 7972, 10869, 10869, 1, 18, 133, 583, 1849, 4706, 10130, 18889, 30545, 41414, 41414]

cp's OEIS Frontend

A071946 Triangle T(n,k) read by rows giving number of underdiagonal lattice paths from (0,0) to (n,k) using only steps R = (1,0), V = (0,1) and D = (3,1).

Table of values

List of values