A080571 - cp's OEIS frontend

A080571 Number of 2's in partition of n-th Ulam number into sum of two distinct Ulam numbers.

n	a(n)
1	0
2	1
3	1
4	1
5	2
6	3
7	4
8	5
9	6
10	7
11	10
12	11
13	14
14	15
15	18
16	18
17	20
18	21
19	24
20	26
21	27
22	29
23	31
24	33
25	37
26	38
27	39
28	40
29	43
30	47
31	50
32	53
33	55
34	56
35	59
36	66
37	67
38	68
39	69
40	72
41	75
42	78
43	79
44	83
45	84
46	90
47	91
48	92
49	93
50	96
51	98
52	99
53	104
54	107
55	118
56	120
57	121
58	123
59	128
60	129
61	136
62	137
63	138
64	141
65	146
66	149
67	153
68	154

[0, 1, 1, 1, 2, 3, 4, 5, 6, 7, 10, 11, 14, 15, 18, 18, 20, 21, 24, 26, 27, 29, 31, 33, 37, 38, 39, 40, 43, 47, 50, 53, 55, 56, 59, 66, 67, 68, 69, 72, 75, 78, 79, 83, 84, 90, 91, 92, 93, 96, 98, 99, 104, 107, 118, 120, 121, 123, 128, 129, 136, 137, 138, 141, 146, 149, 153, 154]

cp's OEIS Frontend

A080571 Number of 2's in partition of n-th Ulam number into sum of two distinct Ulam numbers.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	1
5	2
6	3
7	4
8	5
9	6
10	7
11	10
12	11
13	14
14	15
15	18
16	18
17	20
18	21
19	24
20	26
21	27
22	29
23	31
24	33
25	37
26	38
27	39
28	40
29	43
30	47
31	50
32	53
33	55
34	56
35	59
36	66
37	67
38	68
39	69
40	72
41	75
42	78
43	79
44	83
45	84
46	90
47	91
48	92
49	93
50	96
51	98
52	99
53	104
54	107
55	118
56	120
57	121
58	123
59	128
60	129
61	136
62	137
63	138
64	141
65	146
66	149
67	153
68	154

n	a(n)
1	0
2	1
3	1
4	1
5	2
6	3
7	4
8	5
9	6
10	7
11	10
12	11
13	14
14	15
15	18
16	18
17	20
18	21
19	24
20	26
21	27
22	29
23	31
24	33
25	37
26	38
27	39
28	40
29	43
30	47
31	50
32	53
33	55
34	56
35	59
36	66
37	67
38	68
39	69
40	72
41	75
42	78
43	79
44	83
45	84
46	90
47	91
48	92
49	93
50	96
51	98
52	99
53	104
54	107
55	118
56	120
57	121
58	123
59	128
60	129
61	136
62	137
63	138
64	141
65	146
66	149
67	153
68	154

n	a(n)
1	0
2	1
3	1
4	1
5	2
6	3
7	4
8	5
9	6
10	7
11	10
12	11
13	14
14	15
15	18
16	18
17	20
18	21
19	24
20	26
21	27
22	29
23	31
24	33
25	37
26	38
27	39
28	40
29	43
30	47
31	50
32	53
33	55
34	56
35	59
36	66
37	67
38	68
39	69
40	72
41	75
42	78
43	79
44	83
45	84
46	90
47	91
48	92
49	93
50	96
51	98
52	99
53	104
54	107
55	118
56	120
57	121
58	123
59	128
60	129
61	136
62	137
63	138
64	141
65	146
66	149
67	153
68	154