A275824 - cp's OEIS frontend

A275824 Number of ways to write n as pen(x) + pen(y) + pen (z) + 2pen(w), where x,y,z,w are nonnegative integers with x <= y <= z, and pen(k) denotes the pentagonal number k(3*k-1)/2.

n	a(n)
0	1
1	1
2	2
3	2
4	1
5	2
6	1
7	2
8	1
9	1
10	2
11	2
12	3
13	3
14	2
15	3
16	2
17	3
18	1
19	1
20	2
21	1
22	3
23	2
24	6
25	4
26	3
27	4
28	2
29	3
30	2
31	2
32	3
33	1
34	5
35	4
36	4
37	5
38	4
39	4
40	1
41	3
42	3
43	1
44	3
45	5
46	7
47	6
48	4
49	5
50	3
51	5
52	3
53	3
54	4
55	4
56	5
57	4
58	6
59	7
60	3
61	5
62	4
63	4
64	3
65	2
66	6
67	3
68	6
69	5
70	5
71	7
72	7
73	7
74	3
75	6
76	7
77	5
78	4
79	4
80	9

[1, 1, 2, 2, 1, 2, 1, 2, 1, 1, 2, 2, 3, 3, 2, 3, 2, 3, 1, 1, 2, 1, 3, 2, 6, 4, 3, 4, 2, 3, 2, 2, 3, 1, 5, 4, 4, 5, 4, 4, 1, 3, 3, 1, 3, 5, 7, 6, 4, 5, 3, 5, 3, 3, 4, 4, 5, 4, 6, 7, 3, 5, 4, 4, 3, 2, 6, 3, 6, 5, 5, 7, 7, 7, 3, 6, 7, 5, 4, 4, 9]

cp's OEIS Frontend

A275824 Number of ways to write n as pen(x) + pen(y) + pen (z) + 2pen(w), where x,y,z,w are nonnegative integers with x <= y <= z, and pen(k) denotes the pentagonal number k(3*k-1)/2.

Table of values

List of values

n	a(n)
0	1
1	1
2	2
3	2
4	1
5	2
6	1
7	2
8	1
9	1
10	2
11	2
12	3
13	3
14	2
15	3
16	2
17	3
18	1
19	1
20	2
21	1
22	3
23	2
24	6
25	4
26	3
27	4
28	2
29	3
30	2
31	2
32	3
33	1
34	5
35	4
36	4
37	5
38	4
39	4
40	1
41	3
42	3
43	1
44	3
45	5
46	7
47	6
48	4
49	5
50	3
51	5
52	3
53	3
54	4
55	4
56	5
57	4
58	6
59	7
60	3
61	5
62	4
63	4
64	3
65	2
66	6
67	3
68	6
69	5
70	5
71	7
72	7
73	7
74	3
75	6
76	7
77	5
78	4
79	4
80	9

n	a(n)
0	1
1	1
2	2
3	2
4	1
5	2
6	1
7	2
8	1
9	1
10	2
11	2
12	3
13	3
14	2
15	3
16	2
17	3
18	1
19	1
20	2
21	1
22	3
23	2
24	6
25	4
26	3
27	4
28	2
29	3
30	2
31	2
32	3
33	1
34	5
35	4
36	4
37	5
38	4
39	4
40	1
41	3
42	3
43	1
44	3
45	5
46	7
47	6
48	4
49	5
50	3
51	5
52	3
53	3
54	4
55	4
56	5
57	4
58	6
59	7
60	3
61	5
62	4
63	4
64	3
65	2
66	6
67	3
68	6
69	5
70	5
71	7
72	7
73	7
74	3
75	6
76	7
77	5
78	4
79	4
80	9

cp's OEIS Frontend

A275824 Number of ways to write n as pen(x) + pen(y) + pen (z) + 2*pen(w), where x,y,z,w are nonnegative integers with x <= y <= z, and pen(k) denotes the pentagonal number k*(3*k-1)/2.

Table of values

List of values

A275824 Number of ways to write n as pen(x) + pen(y) + pen (z) + 2pen(w), where x,y,z,w are nonnegative integers with x <= y <= z, and pen(k) denotes the pentagonal number k(3*k-1)/2.

n	a(n)
0	1
1	1
2	2
3	2
4	1
5	2
6	1
7	2
8	1
9	1
10	2
11	2
12	3
13	3
14	2
15	3
16	2
17	3
18	1
19	1
20	2
21	1
22	3
23	2
24	6
25	4
26	3
27	4
28	2
29	3
30	2
31	2
32	3
33	1
34	5
35	4
36	4
37	5
38	4
39	4
40	1
41	3
42	3
43	1
44	3
45	5
46	7
47	6
48	4
49	5
50	3
51	5
52	3
53	3
54	4
55	4
56	5
57	4
58	6
59	7
60	3
61	5
62	4
63	4
64	3
65	2
66	6
67	3
68	6
69	5
70	5
71	7
72	7
73	7
74	3
75	6
76	7
77	5
78	4
79	4
80	9