A135856 - cp's OEIS frontend

A135856 A007318 * a bidiagonal matrix with all 1's in the main diagonal and all 4's in the subdiagonal.

n	a(n)
1	1
2	5
3	1
4	9
5	6
6	1
7	13
8	15
9	7
10	1
11	17
12	28
13	22
14	8
15	1
16	21
17	45
18	50
19	30
20	9
21	1
22	25
23	66
24	95
25	80
26	39
27	10
28	1
29	29
30	91
31	161
32	175
33	119
34	49
35	11
36	1
37	33
38	120
39	252
40	336
41	294
42	168
43	60
44	12
45	1
46	37
47	153
48	372
49	588
50	630
51	462
52	228
53	72
54	13
55	1

[1, 5, 1, 9, 6, 1, 13, 15, 7, 1, 17, 28, 22, 8, 1, 21, 45, 50, 30, 9, 1, 25, 66, 95, 80, 39, 10, 1, 29, 91, 161, 175, 119, 49, 11, 1, 33, 120, 252, 336, 294, 168, 60, 12, 1, 37, 153, 372, 588, 630, 462, 228, 72, 13, 1]

cp's OEIS Frontend

A135856 A007318 * a bidiagonal matrix with all 1's in the main diagonal and all 4's in the subdiagonal.

Table of values

List of values

n	a(n)
1	1
2	5
3	1
4	9
5	6
6	1
7	13
8	15
9	7
10	1
11	17
12	28
13	22
14	8
15	1
16	21
17	45
18	50
19	30
20	9
21	1
22	25
23	66
24	95
25	80
26	39
27	10
28	1
29	29
30	91
31	161
32	175
33	119
34	49
35	11
36	1
37	33
38	120
39	252
40	336
41	294
42	168
43	60
44	12
45	1
46	37
47	153
48	372
49	588
50	630
51	462
52	228
53	72
54	13
55	1

n	a(n)
1	1
2	5
3	1
4	9
5	6
6	1
7	13
8	15
9	7
10	1
11	17
12	28
13	22
14	8
15	1
16	21
17	45
18	50
19	30
20	9
21	1
22	25
23	66
24	95
25	80
26	39
27	10
28	1
29	29
30	91
31	161
32	175
33	119
34	49
35	11
36	1
37	33
38	120
39	252
40	336
41	294
42	168
43	60
44	12
45	1
46	37
47	153
48	372
49	588
50	630
51	462
52	228
53	72
54	13
55	1

n	a(n)
1	1
2	5
3	1
4	9
5	6
6	1
7	13
8	15
9	7
10	1
11	17
12	28
13	22
14	8
15	1
16	21
17	45
18	50
19	30
20	9
21	1
22	25
23	66
24	95
25	80
26	39
27	10
28	1
29	29
30	91
31	161
32	175
33	119
34	49
35	11
36	1
37	33
38	120
39	252
40	336
41	294
42	168
43	60
44	12
45	1
46	37
47	153
48	372
49	588
50	630
51	462
52	228
53	72
54	13
55	1