A210838 - cp's OEIS frontend

A210838 Coordinates (x,y) of the endpoint of a structure (or curve) formed by Q-toothpicks of size = 1..n. The inflection points are the n-th nodes if n is a triangular number A000217.

n	a(n)
0	0
1	0
2	1
3	1
4	3
5	3
6	0
7	6
8	-4
9	10
10	1
11	15
12	7
13	9
14	14
15	2
16	22
17	10
18	13
19	19
20	3
21	9
22	-8
23	-2
24	-20
25	10
26	-7
27	23
28	7
29	9
30	-8
31	-6
32	-24
33	-22
34	-7
35	-39
36	11
37	-21
38	-8
39	-2
40	-28
41	-22
42	-7
43	-43
44	15
45	-65
46	-8
47	-88
48	-32
49	-64
50	-7
51	-39
52	19
53	-65
54	-8
55	-92
56	-36
57	-64
58	-65
59	-35
60	-95
61	-65
62	-64
63	-96

[0, 0, 1, 1, 3, 3, 0, 6, -4, 10, 1, 15, 7, 9, 14, 2, 22, 10, 13, 19, 3, 9, -8, -2, -20, 10, -7, 23, 7, 9, -8, -6, -24, -22, -7, -39, 11, -21, -8, -2, -28, -22, -7, -43, 15, -65, -8, -88, -32, -64, -7, -39, 19, -65, -8, -92, -36, -64, -65, -35, -95, -65, -64, -96]

cp's OEIS Frontend

A210838 Coordinates (x,y) of the endpoint of a structure (or curve) formed by Q-toothpicks of size = 1..n. The inflection points are the n-th nodes if n is a triangular number A000217.

Table of values

List of values

n	a(n)
0	0
1	0
2	1
3	1
4	3
5	3
6	0
7	6
8	-4
9	10
10	1
11	15
12	7
13	9
14	14
15	2
16	22
17	10
18	13
19	19
20	3
21	9
22	-8
23	-2
24	-20
25	10
26	-7
27	23
28	7
29	9
30	-8
31	-6
32	-24
33	-22
34	-7
35	-39
36	11
37	-21
38	-8
39	-2
40	-28
41	-22
42	-7
43	-43
44	15
45	-65
46	-8
47	-88
48	-32
49	-64
50	-7
51	-39
52	19
53	-65
54	-8
55	-92
56	-36
57	-64
58	-65
59	-35
60	-95
61	-65
62	-64
63	-96

n	a(n)
0	0
1	0
2	1
3	1
4	3
5	3
6	0
7	6
8	-4
9	10
10	1
11	15
12	7
13	9
14	14
15	2
16	22
17	10
18	13
19	19
20	3
21	9
22	-8
23	-2
24	-20
25	10
26	-7
27	23
28	7
29	9
30	-8
31	-6
32	-24
33	-22
34	-7
35	-39
36	11
37	-21
38	-8
39	-2
40	-28
41	-22
42	-7
43	-43
44	15
45	-65
46	-8
47	-88
48	-32
49	-64
50	-7
51	-39
52	19
53	-65
54	-8
55	-92
56	-36
57	-64
58	-65
59	-35
60	-95
61	-65
62	-64
63	-96

n	a(n)
0	0
1	0
2	1
3	1
4	3
5	3
6	0
7	6
8	-4
9	10
10	1
11	15
12	7
13	9
14	14
15	2
16	22
17	10
18	13
19	19
20	3
21	9
22	-8
23	-2
24	-20
25	10
26	-7
27	23
28	7
29	9
30	-8
31	-6
32	-24
33	-22
34	-7
35	-39
36	11
37	-21
38	-8
39	-2
40	-28
41	-22
42	-7
43	-43
44	15
45	-65
46	-8
47	-88
48	-32
49	-64
50	-7
51	-39
52	19
53	-65
54	-8
55	-92
56	-36
57	-64
58	-65
59	-35
60	-95
61	-65
62	-64
63	-96