A084602 - cp's OEIS frontend

A084602 Triangle, read by rows, where the n-th row lists the (2n+1) coefficients of (1 + x + 3x^2)^n.

n	a(n)
0	1
1	1
2	1
3	3
4	1
5	2
6	7
7	6
8	9
9	1
10	3
11	12
12	19
13	36
14	27
15	27
16	1
17	4
18	18
19	40
20	91
21	120
22	162
23	108
24	81
25	1
26	5
27	25
28	70
29	185
30	331
31	555
32	630
33	675
34	405
35	243
36	1
37	6
38	33
39	110
40	330
41	726
42	1441
43	2178
44	2970
45	2970
46	2673
47	1458
48	729
49	1
50	7
51	42
52	161
53	539
54	1386
55	3157
56	5797
57	9471
58	12474
59	14553

[1, 1, 1, 3, 1, 2, 7, 6, 9, 1, 3, 12, 19, 36, 27, 27, 1, 4, 18, 40, 91, 120, 162, 108, 81, 1, 5, 25, 70, 185, 331, 555, 630, 675, 405, 243, 1, 6, 33, 110, 330, 726, 1441, 2178, 2970, 2970, 2673, 1458, 729, 1, 7, 42, 161, 539, 1386, 3157, 5797, 9471, 12474, 14553]

cp's OEIS Frontend

A084602 Triangle, read by rows, where the n-th row lists the (2n+1) coefficients of (1 + x + 3x^2)^n.

Table of values

List of values