A166880 - cp's OEIS frontend

A166880 Triangle T(n,k), read by rows n>=0 with terms k=1..3^n, where row n lists the coefficients in the n-th iteration of (x+x^2+x^3).

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	2
6	4
7	6
8	8
9	8
10	6
11	3
12	1
13	1
14	3
15	9
16	24
17	60
18	138
19	294
20	579
21	1053
22	1767
23	2739
24	3924
25	5196
26	6352
27	7152
28	7389
29	6969
30	5961
31	4587
32	3144
33	1896
34	990
35	438
36	159
37	45
38	9
39	1
40	1
41	4
42	16
43	60
44	216
45	744
46	2460
47	7818
48	23910
49	70446
50	200160
51	549006
52	1455132
53	3730846
54	9262712

[1, 1, 1, 1, 1, 2, 4, 6, 8, 8, 6, 3, 1, 1, 3, 9, 24, 60, 138, 294, 579, 1053, 1767, 2739, 3924, 5196, 6352, 7152, 7389, 6969, 5961, 4587, 3144, 1896, 990, 438, 159, 45, 9, 1, 1, 4, 16, 60, 216, 744, 2460, 7818, 23910, 70446, 200160, 549006, 1455132, 3730846, 9262712]

cp's OEIS Frontend

A166880 Triangle T(n,k), read by rows n>=0 with terms k=1..3^n, where row n lists the coefficients in the n-th iteration of (x+x^2+x^3).

Table of values

List of values