A304249 - cp's OEIS frontend

A304249 Triangle T(n,k) = 3*T(n-1,k) + T(n-2,k-1) for k = 0..floor(n/2), with T(0,0) = 1 and T(n,k) = 0 for n < 0 or k < 0, read by rows.

n	a(n)
0	1
1	3
2	9
3	1
4	27
5	6
6	81
7	27
8	1
9	243
10	108
11	9
12	729
13	405
14	54
15	1
16	2187
17	1458
18	270
19	12
20	6561
21	5103
22	1215
23	90
24	1
25	19683
26	17496
27	5103
28	540
29	15
30	59049
31	59049
32	20412
33	2835
34	135
35	1
36	177147
37	196830
38	78732
39	13608
40	945
41	18
42	531441
43	649539
44	295245
45	61236
46	5670
47	189
48	1

[1, 3, 9, 1, 27, 6, 81, 27, 1, 243, 108, 9, 729, 405, 54, 1, 2187, 1458, 270, 12, 6561, 5103, 1215, 90, 1, 19683, 17496, 5103, 540, 15, 59049, 59049, 20412, 2835, 135, 1, 177147, 196830, 78732, 13608, 945, 18, 531441, 649539, 295245, 61236, 5670, 189, 1]

cp's OEIS Frontend

A304249 Triangle T(n,k) = 3*T(n-1,k) + T(n-2,k-1) for k = 0..floor(n/2), with T(0,0) = 1 and T(n,k) = 0 for n < 0 or k < 0, read by rows.

Table of values

List of values