A001399 - cp's OEIS frontend

A001399 a(n) is the number of partitions of n into at most 3 parts; also partitions of n+3 in which the greatest part is 3; also number of unlabeled multigraphs with 3 nodes and n edges.

n	a(n)
0	1
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	10
9	12
10	14
11	16
12	19
13	21
14	24
15	27
16	30
17	33
18	37
19	40
20	44
21	48
22	52
23	56
24	61
25	65
26	70
27	75
28	80
29	85
30	91
31	96
32	102
33	108
34	114
35	120
36	127
37	133
38	140
39	147
40	154
41	161
42	169
43	176
44	184
45	192
46	200
47	208
48	217
49	225
50	234
51	243
52	252
53	261
54	271
55	280
56	290
57	300
58	310
59	320
60	331
61	341

[1, 1, 2, 3, 4, 5, 7, 8, 10, 12, 14, 16, 19, 21, 24, 27, 30, 33, 37, 40, 44, 48, 52, 56, 61, 65, 70, 75, 80, 85, 91, 96, 102, 108, 114, 120, 127, 133, 140, 147, 154, 161, 169, 176, 184, 192, 200, 208, 217, 225, 234, 243, 252, 261, 271, 280, 290, 300, 310, 320, 331, 341]

cp's OEIS Frontend

A001399 a(n) is the number of partitions of n into at most 3 parts; also partitions of n+3 in which the greatest part is 3; also number of unlabeled multigraphs with 3 nodes and n edges.

Table of values

List of values

n	a(n)
0	1
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	10
9	12
10	14
11	16
12	19
13	21
14	24
15	27
16	30
17	33
18	37
19	40
20	44
21	48
22	52
23	56
24	61
25	65
26	70
27	75
28	80
29	85
30	91
31	96
32	102
33	108
34	114
35	120
36	127
37	133
38	140
39	147
40	154
41	161
42	169
43	176
44	184
45	192
46	200
47	208
48	217
49	225
50	234
51	243
52	252
53	261
54	271
55	280
56	290
57	300
58	310
59	320
60	331
61	341

n	a(n)
0	1
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	10
9	12
10	14
11	16
12	19
13	21
14	24
15	27
16	30
17	33
18	37
19	40
20	44
21	48
22	52
23	56
24	61
25	65
26	70
27	75
28	80
29	85
30	91
31	96
32	102
33	108
34	114
35	120
36	127
37	133
38	140
39	147
40	154
41	161
42	169
43	176
44	184
45	192
46	200
47	208
48	217
49	225
50	234
51	243
52	252
53	261
54	271
55	280
56	290
57	300
58	310
59	320
60	331
61	341

n	a(n)
0	1
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	10
9	12
10	14
11	16
12	19
13	21
14	24
15	27
16	30
17	33
18	37
19	40
20	44
21	48
22	52
23	56
24	61
25	65
26	70
27	75
28	80
29	85
30	91
31	96
32	102
33	108
34	114
35	120
36	127
37	133
38	140
39	147
40	154
41	161
42	169
43	176
44	184
45	192
46	200
47	208
48	217
49	225
50	234
51	243
52	252
53	261
54	271
55	280
56	290
57	300
58	310
59	320
60	331
61	341