A054225 - cp's OEIS frontend

A054225 Triangle read by rows: row n (n>=0) gives the number of partitions of (n,0), (n-1,1), (n-2,2), ..., (0,n) respectively into sums of pairs.

n	a(n)
0	1
1	1
2	1
3	2
4	2
5	2
6	3
7	4
8	4
9	3
10	5
11	7
12	9
13	7
14	5
15	7
16	12
17	16
18	16
19	12
20	7
21	11
22	19
23	29
24	31
25	29
26	19
27	11
28	15
29	30
30	47
31	57
32	57
33	47
34	30
35	15
36	22
37	45
38	77
39	97
40	109
41	97
42	77
43	45
44	22
45	30
46	67
47	118
48	162
49	189
50	189
51	162
52	118
53	67
54	30
55	42
56	97
57	181
58	257
59	323
60	339
61	323
62	257
63	181
64	97
65	42
66	56
67	139
68	267
69	401
70	522
71	589
72	589
73	522
74	401
75	267
76	139
77	56

[1, 1, 1, 2, 2, 2, 3, 4, 4, 3, 5, 7, 9, 7, 5, 7, 12, 16, 16, 12, 7, 11, 19, 29, 31, 29, 19, 11, 15, 30, 47, 57, 57, 47, 30, 15, 22, 45, 77, 97, 109, 97, 77, 45, 22, 30, 67, 118, 162, 189, 189, 162, 118, 67, 30, 42, 97, 181, 257, 323, 339, 323, 257, 181, 97, 42, 56, 139, 267, 401, 522, 589, 589, 522, 401, 267, 139, 56]

cp's OEIS Frontend

A054225 Triangle read by rows: row n (n>=0) gives the number of partitions of (n,0), (n-1,1), (n-2,2), ..., (0,n) respectively into sums of pairs.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	2
4	2
5	2
6	3
7	4
8	4
9	3
10	5
11	7
12	9
13	7
14	5
15	7
16	12
17	16
18	16
19	12
20	7
21	11
22	19
23	29
24	31
25	29
26	19
27	11
28	15
29	30
30	47
31	57
32	57
33	47
34	30
35	15
36	22
37	45
38	77
39	97
40	109
41	97
42	77
43	45
44	22
45	30
46	67
47	118
48	162
49	189
50	189
51	162
52	118
53	67
54	30
55	42
56	97
57	181
58	257
59	323
60	339
61	323
62	257
63	181
64	97
65	42
66	56
67	139
68	267
69	401
70	522
71	589
72	589
73	522
74	401
75	267
76	139
77	56

n	a(n)
0	1
1	1
2	1
3	2
4	2
5	2
6	3
7	4
8	4
9	3
10	5
11	7
12	9
13	7
14	5
15	7
16	12
17	16
18	16
19	12
20	7
21	11
22	19
23	29
24	31
25	29
26	19
27	11
28	15
29	30
30	47
31	57
32	57
33	47
34	30
35	15
36	22
37	45
38	77
39	97
40	109
41	97
42	77
43	45
44	22
45	30
46	67
47	118
48	162
49	189
50	189
51	162
52	118
53	67
54	30
55	42
56	97
57	181
58	257
59	323
60	339
61	323
62	257
63	181
64	97
65	42
66	56
67	139
68	267
69	401
70	522
71	589
72	589
73	522
74	401
75	267
76	139
77	56

n	a(n)
0	1
1	1
2	1
3	2
4	2
5	2
6	3
7	4
8	4
9	3
10	5
11	7
12	9
13	7
14	5
15	7
16	12
17	16
18	16
19	12
20	7
21	11
22	19
23	29
24	31
25	29
26	19
27	11
28	15
29	30
30	47
31	57
32	57
33	47
34	30
35	15
36	22
37	45
38	77
39	97
40	109
41	97
42	77
43	45
44	22
45	30
46	67
47	118
48	162
49	189
50	189
51	162
52	118
53	67
54	30
55	42
56	97
57	181
58	257
59	323
60	339
61	323
62	257
63	181
64	97
65	42
66	56
67	139
68	267
69	401
70	522
71	589
72	589
73	522
74	401
75	267
76	139
77	56