A326454 - cp's OEIS frontend

A326454 Irregular triangle read by rows: T(n,k) is the number of small Schröder paths such that the area between the path and the x-axis is equal to n and contains k down-triangles.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	3
7	1
8	5
9	1
10	1
11	7
12	5
13	1
14	9
15	13
16	1
17	1
18	11
19	25
20	8
21	1
22	13
23	41
24	28
25	1
26	1
27	15
28	61
29	68
30	11
31	1
32	17
33	85
34	136
35	51
36	1
37	1
38	19
39	113
40	240
41	155
42	15
43	1
44	21
45	145
46	388
47	371
48	86
49	1
50	1
51	23
52	181
53	588
54	763
55	314
56	19

[1, 1, 1, 1, 1, 1, 3, 1, 5, 1, 1, 7, 5, 1, 9, 13, 1, 1, 11, 25, 8, 1, 13, 41, 28, 1, 1, 15, 61, 68, 11, 1, 17, 85, 136, 51, 1, 1, 19, 113, 240, 155, 15, 1, 21, 145, 388, 371, 86, 1, 1, 23, 181, 588, 763, 314, 19]

cp's OEIS Frontend

A326454 Irregular triangle read by rows: T(n,k) is the number of small Schröder paths such that the area between the path and the x-axis is equal to n and contains k down-triangles.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	3
7	1
8	5
9	1
10	1
11	7
12	5
13	1
14	9
15	13
16	1
17	1
18	11
19	25
20	8
21	1
22	13
23	41
24	28
25	1
26	1
27	15
28	61
29	68
30	11
31	1
32	17
33	85
34	136
35	51
36	1
37	1
38	19
39	113
40	240
41	155
42	15
43	1
44	21
45	145
46	388
47	371
48	86
49	1
50	1
51	23
52	181
53	588
54	763
55	314
56	19

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	3
7	1
8	5
9	1
10	1
11	7
12	5
13	1
14	9
15	13
16	1
17	1
18	11
19	25
20	8
21	1
22	13
23	41
24	28
25	1
26	1
27	15
28	61
29	68
30	11
31	1
32	17
33	85
34	136
35	51
36	1
37	1
38	19
39	113
40	240
41	155
42	15
43	1
44	21
45	145
46	388
47	371
48	86
49	1
50	1
51	23
52	181
53	588
54	763
55	314
56	19

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	3
7	1
8	5
9	1
10	1
11	7
12	5
13	1
14	9
15	13
16	1
17	1
18	11
19	25
20	8
21	1
22	13
23	41
24	28
25	1
26	1
27	15
28	61
29	68
30	11
31	1
32	17
33	85
34	136
35	51
36	1
37	1
38	19
39	113
40	240
41	155
42	15
43	1
44	21
45	145
46	388
47	371
48	86
49	1
50	1
51	23
52	181
53	588
54	763
55	314
56	19