A099751 - cp's OEIS frontend

A099751 Number of ways to write n as differences of (-4)-gonal numbers. If pe(n):=1/2n((e-2)*n+(4-e)) is the n-th e-gonal number, then a(n) = |{(m,k) of Z X Z; pe(-1)(m+k)-pe(m-1)=n}| for e=-4.

n	a(n)
1	1
2	0
3	1
4	1
5	2
6	0
7	2
8	2
9	1
10	0
11	2
12	1
13	2
14	0
15	2
16	3
17	2
18	0
19	2
20	2
21	2
22	0
23	2
24	2
25	3
26	0
27	1
28	2
29	2
30	0
31	2
32	4
33	2
34	0
35	4
36	1
37	2
38	0
39	2
40	4
41	2
42	0
43	2
44	2
45	2
46	0
47	2
48	3
49	3
50	0
51	2
52	2
53	2
54	0
55	4
56	4
57	2
58	0
59	2
60	2
61	2
62	0
63	2
64	5
65	4
66	0
67	2
68	2
69	2
70	0
71	2
72	2
73	2
74	0
75	3
76	2
77	4
78	0
79	2
80	6
81	1
82	0
83	2
84	2
85	4
86	0
87	2
88	4
89	2
90	0
91	4
92	2
93	2
94	0
95	4
96	4
97	2
98	0
99	2
100	3
101	2
102	0
103	2
104	4
105	4

[1, 0, 1, 1, 2, 0, 2, 2, 1, 0, 2, 1, 2, 0, 2, 3, 2, 0, 2, 2, 2, 0, 2, 2, 3, 0, 1, 2, 2, 0, 2, 4, 2, 0, 4, 1, 2, 0, 2, 4, 2, 0, 2, 2, 2, 0, 2, 3, 3, 0, 2, 2, 2, 0, 4, 4, 2, 0, 2, 2, 2, 0, 2, 5, 4, 0, 2, 2, 2, 0, 2, 2, 2, 0, 3, 2, 4, 0, 2, 6, 1, 0, 2, 2, 4, 0, 2, 4, 2, 0, 4, 2, 2, 0, 4, 4, 2, 0, 2, 3, 2, 0, 2, 4, 4]

cp's OEIS Frontend

A099751 Number of ways to write n as differences of (-4)-gonal numbers. If pe(n):=1/2n((e-2)*n+(4-e)) is the n-th e-gonal number, then a(n) = |{(m,k) of Z X Z; pe(-1)(m+k)-pe(m-1)=n}| for e=-4.

Table of values

List of values

n	a(n)
1	1
2	0
3	1
4	1
5	2
6	0
7	2
8	2
9	1
10	0
11	2
12	1
13	2
14	0
15	2
16	3
17	2
18	0
19	2
20	2
21	2
22	0
23	2
24	2
25	3
26	0
27	1
28	2
29	2
30	0
31	2
32	4
33	2
34	0
35	4
36	1
37	2
38	0
39	2
40	4
41	2
42	0
43	2
44	2
45	2
46	0
47	2
48	3
49	3
50	0
51	2
52	2
53	2
54	0
55	4
56	4
57	2
58	0
59	2
60	2
61	2
62	0
63	2
64	5
65	4
66	0
67	2
68	2
69	2
70	0
71	2
72	2
73	2
74	0
75	3
76	2
77	4
78	0
79	2
80	6
81	1
82	0
83	2
84	2
85	4
86	0
87	2
88	4
89	2
90	0
91	4
92	2
93	2
94	0
95	4
96	4
97	2
98	0
99	2
100	3
101	2
102	0
103	2
104	4
105	4

n	a(n)
1	1
2	0
3	1
4	1
5	2
6	0
7	2
8	2
9	1
10	0
11	2
12	1
13	2
14	0
15	2
16	3
17	2
18	0
19	2
20	2
21	2
22	0
23	2
24	2
25	3
26	0
27	1
28	2
29	2
30	0
31	2
32	4
33	2
34	0
35	4
36	1
37	2
38	0
39	2
40	4
41	2
42	0
43	2
44	2
45	2
46	0
47	2
48	3
49	3
50	0
51	2
52	2
53	2
54	0
55	4
56	4
57	2
58	0
59	2
60	2
61	2
62	0
63	2
64	5
65	4
66	0
67	2
68	2
69	2
70	0
71	2
72	2
73	2
74	0
75	3
76	2
77	4
78	0
79	2
80	6
81	1
82	0
83	2
84	2
85	4
86	0
87	2
88	4
89	2
90	0
91	4
92	2
93	2
94	0
95	4
96	4
97	2
98	0
99	2
100	3
101	2
102	0
103	2
104	4
105	4

cp's OEIS Frontend

A099751 Number of ways to write n as differences of (-4)-gonal numbers. If pe(n):=1/2*n*((e-2)*n+(4-e)) is the n-th e-gonal number, then a(n) = |{(m,k) of Z X Z; pe(-1)(m+k)-pe(m-1)=n}| for e=-4.

Table of values

List of values

A099751 Number of ways to write n as differences of (-4)-gonal numbers. If pe(n):=1/2n((e-2)*n+(4-e)) is the n-th e-gonal number, then a(n) = |{(m,k) of Z X Z; pe(-1)(m+k)-pe(m-1)=n}| for e=-4.

n	a(n)
1	1
2	0
3	1
4	1
5	2
6	0
7	2
8	2
9	1
10	0
11	2
12	1
13	2
14	0
15	2
16	3
17	2
18	0
19	2
20	2
21	2
22	0
23	2
24	2
25	3
26	0
27	1
28	2
29	2
30	0
31	2
32	4
33	2
34	0
35	4
36	1
37	2
38	0
39	2
40	4
41	2
42	0
43	2
44	2
45	2
46	0
47	2
48	3
49	3
50	0
51	2
52	2
53	2
54	0
55	4
56	4
57	2
58	0
59	2
60	2
61	2
62	0
63	2
64	5
65	4
66	0
67	2
68	2
69	2
70	0
71	2
72	2
73	2
74	0
75	3
76	2
77	4
78	0
79	2
80	6
81	1
82	0
83	2
84	2
85	4
86	0
87	2
88	4
89	2
90	0
91	4
92	2
93	2
94	0
95	4
96	4
97	2
98	0
99	2
100	3
101	2
102	0
103	2
104	4
105	4