A227532 - cp's OEIS frontend

A227532 Logarithmic derivative, wrt x, of triangle A227543, as read by terms k=0..n*(n-1)/2 in rows n>=1.

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	3
7	3
8	1
9	4
10	6
11	8
12	8
13	4
14	4
15	1
16	5
17	10
18	15
19	20
20	20
21	20
22	15
23	10
24	5
25	5
26	1
27	6
28	15
29	26
30	39
31	48
32	57
33	60
34	54
35	48
36	36
37	30
38	18
39	12
40	6
41	6
42	1
43	7
44	21
45	42
46	70
47	98
48	126
49	154
50	168
51	175
52	168
53	154
54	133
55	112
56	84
57	70
58	49
59	35
60	21
61	14
62	7
63	7
64	1
65	8
66	28
67	64
68	118
69	184
70	256
71	336
72	408
73	472
74	516
75	536
76	532
77	504
78	464
79	408
80	360
81	296
82	248
83	192
84	152
85	112
86	88
87	56
88	40
89	24
90	16
91	8
92	8

[1, 1, 2, 1, 3, 3, 3, 1, 4, 6, 8, 8, 4, 4, 1, 5, 10, 15, 20, 20, 20, 15, 10, 5, 5, 1, 6, 15, 26, 39, 48, 57, 60, 54, 48, 36, 30, 18, 12, 6, 6, 1, 7, 21, 42, 70, 98, 126, 154, 168, 175, 168, 154, 133, 112, 84, 70, 49, 35, 21, 14, 7, 7, 1, 8, 28, 64, 118, 184, 256, 336, 408, 472, 516, 536, 532, 504, 464, 408, 360, 296, 248, 192, 152, 112, 88, 56, 40, 24, 16, 8, 8]

cp's OEIS Frontend

A227532 Logarithmic derivative, wrt x, of triangle A227543, as read by terms k=0..n*(n-1)/2 in rows n>=1.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	3
7	3
8	1
9	4
10	6
11	8
12	8
13	4
14	4
15	1
16	5
17	10
18	15
19	20
20	20
21	20
22	15
23	10
24	5
25	5
26	1
27	6
28	15
29	26
30	39
31	48
32	57
33	60
34	54
35	48
36	36
37	30
38	18
39	12
40	6
41	6
42	1
43	7
44	21
45	42
46	70
47	98
48	126
49	154
50	168
51	175
52	168
53	154
54	133
55	112
56	84
57	70
58	49
59	35
60	21
61	14
62	7
63	7
64	1
65	8
66	28
67	64
68	118
69	184
70	256
71	336
72	408
73	472
74	516
75	536
76	532
77	504
78	464
79	408
80	360
81	296
82	248
83	192
84	152
85	112
86	88
87	56
88	40
89	24
90	16
91	8
92	8

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	3
7	3
8	1
9	4
10	6
11	8
12	8
13	4
14	4
15	1
16	5
17	10
18	15
19	20
20	20
21	20
22	15
23	10
24	5
25	5
26	1
27	6
28	15
29	26
30	39
31	48
32	57
33	60
34	54
35	48
36	36
37	30
38	18
39	12
40	6
41	6
42	1
43	7
44	21
45	42
46	70
47	98
48	126
49	154
50	168
51	175
52	168
53	154
54	133
55	112
56	84
57	70
58	49
59	35
60	21
61	14
62	7
63	7
64	1
65	8
66	28
67	64
68	118
69	184
70	256
71	336
72	408
73	472
74	516
75	536
76	532
77	504
78	464
79	408
80	360
81	296
82	248
83	192
84	152
85	112
86	88
87	56
88	40
89	24
90	16
91	8
92	8

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	3
7	3
8	1
9	4
10	6
11	8
12	8
13	4
14	4
15	1
16	5
17	10
18	15
19	20
20	20
21	20
22	15
23	10
24	5
25	5
26	1
27	6
28	15
29	26
30	39
31	48
32	57
33	60
34	54
35	48
36	36
37	30
38	18
39	12
40	6
41	6
42	1
43	7
44	21
45	42
46	70
47	98
48	126
49	154
50	168
51	175
52	168
53	154
54	133
55	112
56	84
57	70
58	49
59	35
60	21
61	14
62	7
63	7
64	1
65	8
66	28
67	64
68	118
69	184
70	256
71	336
72	408
73	472
74	516
75	536
76	532
77	504
78	464
79	408
80	360
81	296
82	248
83	192
84	152
85	112
86	88
87	56
88	40
89	24
90	16
91	8
92	8