A227396 - cp's OEIS frontend

A227396 Triangle A074909(n) with the first column equal to 1 followed by -A000027(n) instead of A000012.

n	a(n)
0	1
1	-1
2	2
3	-2
4	3
5	3
6	-3
7	4
8	6
9	4
10	-4
11	5
12	10
13	10
14	5
15	-5
16	6
17	15
18	20
19	15
20	6
21	-6
22	7
23	21
24	35
25	35
26	21
27	7
28	-7
29	8
30	28
31	56
32	70
33	56
34	28
35	8
36	-8
37	9
38	36
39	84
40	126
41	126
42	84
43	36
44	9
45	-9
46	10
47	45
48	120
49	210
50	252
51	210
52	120
53	45
54	10
55	-10

[1, -1, 2, -2, 3, 3, -3, 4, 6, 4, -4, 5, 10, 10, 5, -5, 6, 15, 20, 15, 6, -6, 7, 21, 35, 35, 21, 7, -7, 8, 28, 56, 70, 56, 28, 8, -8, 9, 36, 84, 126, 126, 84, 36, 9, -9, 10, 45, 120, 210, 252, 210, 120, 45, 10, -10]

cp's OEIS Frontend

A227396 Triangle A074909(n) with the first column equal to 1 followed by -A000027(n) instead of A000012.

Table of values

List of values

n	a(n)
0	1
1	-1
2	2
3	-2
4	3
5	3
6	-3
7	4
8	6
9	4
10	-4
11	5
12	10
13	10
14	5
15	-5
16	6
17	15
18	20
19	15
20	6
21	-6
22	7
23	21
24	35
25	35
26	21
27	7
28	-7
29	8
30	28
31	56
32	70
33	56
34	28
35	8
36	-8
37	9
38	36
39	84
40	126
41	126
42	84
43	36
44	9
45	-9
46	10
47	45
48	120
49	210
50	252
51	210
52	120
53	45
54	10
55	-10

n	a(n)
0	1
1	-1
2	2
3	-2
4	3
5	3
6	-3
7	4
8	6
9	4
10	-4
11	5
12	10
13	10
14	5
15	-5
16	6
17	15
18	20
19	15
20	6
21	-6
22	7
23	21
24	35
25	35
26	21
27	7
28	-7
29	8
30	28
31	56
32	70
33	56
34	28
35	8
36	-8
37	9
38	36
39	84
40	126
41	126
42	84
43	36
44	9
45	-9
46	10
47	45
48	120
49	210
50	252
51	210
52	120
53	45
54	10
55	-10

n	a(n)
0	1
1	-1
2	2
3	-2
4	3
5	3
6	-3
7	4
8	6
9	4
10	-4
11	5
12	10
13	10
14	5
15	-5
16	6
17	15
18	20
19	15
20	6
21	-6
22	7
23	21
24	35
25	35
26	21
27	7
28	-7
29	8
30	28
31	56
32	70
33	56
34	28
35	8
36	-8
37	9
38	36
39	84
40	126
41	126
42	84
43	36
44	9
45	-9
46	10
47	45
48	120
49	210
50	252
51	210
52	120
53	45
54	10
55	-10