A304236 - cp's OEIS frontend

A304236 Triangle T(n,k) = T(n-1,k) + 3*T(n-2,k-1) for k = 0..floor(n/2), with T(0,0) = 1, T(n,k) = 0 for n or k < 0, read by rows.

n	a(n)
0	1
1	1
2	1
3	3
4	1
5	6
6	1
7	9
8	9
9	1
10	12
11	27
12	1
13	15
14	54
15	27
16	1
17	18
18	90
19	108
20	1
21	21
22	135
23	270
24	81
25	1
26	24
27	189
28	540
29	405
30	1
31	27
32	252
33	945
34	1215
35	243
36	1
37	30
38	324
39	1512
40	2835
41	1458
42	1
43	33
44	405
45	2268
46	5670
47	5103
48	729
49	1
50	36
51	495
52	3240
53	10206
54	13608
55	5103
56	1
57	39
58	594
59	4455
60	17010
61	30618
62	20412
63	2187

[1, 1, 1, 3, 1, 6, 1, 9, 9, 1, 12, 27, 1, 15, 54, 27, 1, 18, 90, 108, 1, 21, 135, 270, 81, 1, 24, 189, 540, 405, 1, 27, 252, 945, 1215, 243, 1, 30, 324, 1512, 2835, 1458, 1, 33, 405, 2268, 5670, 5103, 729, 1, 36, 495, 3240, 10206, 13608, 5103, 1, 39, 594, 4455, 17010, 30618, 20412, 2187]

cp's OEIS Frontend

A304236 Triangle T(n,k) = T(n-1,k) + 3*T(n-2,k-1) for k = 0..floor(n/2), with T(0,0) = 1, T(n,k) = 0 for n or k < 0, read by rows.

Table of values

List of values