A051631 - cp's OEIS frontend

A051631 Triangle formed using Pascal's rule except begin and end n-th row with n-1.

n	a(n)
0	-1
1	0
2	0
3	1
4	0
5	1
6	2
7	1
8	1
9	2
10	3
11	3
12	2
13	3
14	3
15	4
16	6
17	5
18	5
19	6
20	4
21	5
22	10
23	11
24	10
25	11
26	10
27	5
28	6
29	15
30	21
31	21
32	21
33	21
34	15
35	6
36	7
37	21
38	36
39	42
40	42
41	42
42	36
43	21
44	7
45	8
46	28
47	57
48	78
49	84
50	84
51	78
52	57
53	28
54	8
55	9
56	36
57	85
58	135
59	162
60	168
61	162
62	135
63	85
64	36
65	9

[-1, 0, 0, 1, 0, 1, 2, 1, 1, 2, 3, 3, 2, 3, 3, 4, 6, 5, 5, 6, 4, 5, 10, 11, 10, 11, 10, 5, 6, 15, 21, 21, 21, 21, 15, 6, 7, 21, 36, 42, 42, 42, 36, 21, 7, 8, 28, 57, 78, 84, 84, 78, 57, 28, 8, 9, 36, 85, 135, 162, 168, 162, 135, 85, 36, 9]

cp's OEIS Frontend

A051631 Triangle formed using Pascal's rule except begin and end n-th row with n-1.

Table of values

List of values

n	a(n)
0	-1
1	0
2	0
3	1
4	0
5	1
6	2
7	1
8	1
9	2
10	3
11	3
12	2
13	3
14	3
15	4
16	6
17	5
18	5
19	6
20	4
21	5
22	10
23	11
24	10
25	11
26	10
27	5
28	6
29	15
30	21
31	21
32	21
33	21
34	15
35	6
36	7
37	21
38	36
39	42
40	42
41	42
42	36
43	21
44	7
45	8
46	28
47	57
48	78
49	84
50	84
51	78
52	57
53	28
54	8
55	9
56	36
57	85
58	135
59	162
60	168
61	162
62	135
63	85
64	36
65	9

n	a(n)
0	-1
1	0
2	0
3	1
4	0
5	1
6	2
7	1
8	1
9	2
10	3
11	3
12	2
13	3
14	3
15	4
16	6
17	5
18	5
19	6
20	4
21	5
22	10
23	11
24	10
25	11
26	10
27	5
28	6
29	15
30	21
31	21
32	21
33	21
34	15
35	6
36	7
37	21
38	36
39	42
40	42
41	42
42	36
43	21
44	7
45	8
46	28
47	57
48	78
49	84
50	84
51	78
52	57
53	28
54	8
55	9
56	36
57	85
58	135
59	162
60	168
61	162
62	135
63	85
64	36
65	9

n	a(n)
0	-1
1	0
2	0
3	1
4	0
5	1
6	2
7	1
8	1
9	2
10	3
11	3
12	2
13	3
14	3
15	4
16	6
17	5
18	5
19	6
20	4
21	5
22	10
23	11
24	10
25	11
26	10
27	5
28	6
29	15
30	21
31	21
32	21
33	21
34	15
35	6
36	7
37	21
38	36
39	42
40	42
41	42
42	36
43	21
44	7
45	8
46	28
47	57
48	78
49	84
50	84
51	78
52	57
53	28
54	8
55	9
56	36
57	85
58	135
59	162
60	168
61	162
62	135
63	85
64	36
65	9