A135855 - cp's OEIS frontend

A135855 A007318 * a tridiagonal matrix with (1, 4, 1, 0, 0, 0, ...) in every column.

n	a(n)
0	1
1	5
2	1
3	10
4	6
5	1
6	16
7	16
8	7
9	1
10	23
11	32
12	23
13	8
14	1
15	31
16	55
17	55
18	31
19	9
20	1
21	40
22	86
23	110
24	86
25	40
26	10
27	1
28	50
29	126
30	196
31	196
32	126
33	50
34	11
35	1
36	61
37	176
38	322
39	392
40	322
41	176
42	61
43	12
44	1
45	73
46	237
47	498
48	714
49	714
50	498
51	237
52	73
53	13
54	1

[1, 5, 1, 10, 6, 1, 16, 16, 7, 1, 23, 32, 23, 8, 1, 31, 55, 55, 31, 9, 1, 40, 86, 110, 86, 40, 10, 1, 50, 126, 196, 196, 126, 50, 11, 1, 61, 176, 322, 392, 322, 176, 61, 12, 1, 73, 237, 498, 714, 714, 498, 237, 73, 13, 1]

cp's OEIS Frontend

A135855 A007318 * a tridiagonal matrix with (1, 4, 1, 0, 0, 0, ...) in every column.

Table of values

List of values

n	a(n)
0	1
1	5
2	1
3	10
4	6
5	1
6	16
7	16
8	7
9	1
10	23
11	32
12	23
13	8
14	1
15	31
16	55
17	55
18	31
19	9
20	1
21	40
22	86
23	110
24	86
25	40
26	10
27	1
28	50
29	126
30	196
31	196
32	126
33	50
34	11
35	1
36	61
37	176
38	322
39	392
40	322
41	176
42	61
43	12
44	1
45	73
46	237
47	498
48	714
49	714
50	498
51	237
52	73
53	13
54	1

n	a(n)
0	1
1	5
2	1
3	10
4	6
5	1
6	16
7	16
8	7
9	1
10	23
11	32
12	23
13	8
14	1
15	31
16	55
17	55
18	31
19	9
20	1
21	40
22	86
23	110
24	86
25	40
26	10
27	1
28	50
29	126
30	196
31	196
32	126
33	50
34	11
35	1
36	61
37	176
38	322
39	392
40	322
41	176
42	61
43	12
44	1
45	73
46	237
47	498
48	714
49	714
50	498
51	237
52	73
53	13
54	1

n	a(n)
0	1
1	5
2	1
3	10
4	6
5	1
6	16
7	16
8	7
9	1
10	23
11	32
12	23
13	8
14	1
15	31
16	55
17	55
18	31
19	9
20	1
21	40
22	86
23	110
24	86
25	40
26	10
27	1
28	50
29	126
30	196
31	196
32	126
33	50
34	11
35	1
36	61
37	176
38	322
39	392
40	322
41	176
42	61
43	12
44	1
45	73
46	237
47	498
48	714
49	714
50	498
51	237
52	73
53	13
54	1