A318773 - cp's OEIS frontend

A318773 Triangle T(n,k) = 3*T(n-1,k) + T(n-4,k-1) for k = 0..floor(n/4), with T(0,0) = 1 and T(n,k) = 0 for n or k < 0, read by rows.

n	a(n)
0	1
1	3
2	9
3	27
4	81
5	1
6	243
7	6
8	729
9	27
10	2187
11	108
12	6561
13	405
14	1
15	19683
16	1458
17	9
18	59049
19	5103
20	54
21	177147
22	17496
23	270
24	531441
25	59049
26	1215
27	1
28	1594323
29	196830
30	5103
31	12
32	4782969
33	649539
34	20412
35	90
36	14348907
37	2125764
38	78732
39	540
40	43046721
41	6908733
42	295245
43	2835
44	1
45	129140163
46	22320522
47	1082565
48	13608
49	15

[1, 3, 9, 27, 81, 1, 243, 6, 729, 27, 2187, 108, 6561, 405, 1, 19683, 1458, 9, 59049, 5103, 54, 177147, 17496, 270, 531441, 59049, 1215, 1, 1594323, 196830, 5103, 12, 4782969, 649539, 20412, 90, 14348907, 2125764, 78732, 540, 43046721, 6908733, 295245, 2835, 1, 129140163, 22320522, 1082565, 13608, 15]

cp's OEIS Frontend

A318773 Triangle T(n,k) = 3*T(n-1,k) + T(n-4,k-1) for k = 0..floor(n/4), with T(0,0) = 1 and T(n,k) = 0 for n or k < 0, read by rows.

Table of values

List of values