A154403 - cp's OEIS frontend

A154403 Number of ways to write n as a sum a_1 + ... + a_k where a_i >= 2 * a_{i-1} > 1.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	2
7	2
8	2
9	3
10	3
11	3
12	4
13	4
14	5
15	6
16	6
17	7
18	8
19	8
20	9
21	11
22	11
23	12
24	14
25	14
26	15
27	17
28	18
29	19
30	22
31	23
32	24
33	27
34	28
35	30
36	33
37	35
38	37
39	40
40	42
41	44
42	48
43	50
44	53
45	58
46	60
47	63
48	68
49	71
50	74
51	80
52	84
53	87
54	93
55	97
56	101
57	107
58	112
59	117
60	124
61	129
62	135
63	143
64	148
65	155
66	164
67	170
68	177
69	187
70	194

[1, 1, 1, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 5, 6, 6, 7, 8, 8, 9, 11, 11, 12, 14, 14, 15, 17, 18, 19, 22, 23, 24, 27, 28, 30, 33, 35, 37, 40, 42, 44, 48, 50, 53, 58, 60, 63, 68, 71, 74, 80, 84, 87, 93, 97, 101, 107, 112, 117, 124, 129, 135, 143, 148, 155, 164, 170, 177, 187, 194]

cp's OEIS Frontend

A154403 Number of ways to write n as a sum a_1 + ... + a_k where a_i >= 2 * a_{i-1} > 1.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	2
7	2
8	2
9	3
10	3
11	3
12	4
13	4
14	5
15	6
16	6
17	7
18	8
19	8
20	9
21	11
22	11
23	12
24	14
25	14
26	15
27	17
28	18
29	19
30	22
31	23
32	24
33	27
34	28
35	30
36	33
37	35
38	37
39	40
40	42
41	44
42	48
43	50
44	53
45	58
46	60
47	63
48	68
49	71
50	74
51	80
52	84
53	87
54	93
55	97
56	101
57	107
58	112
59	117
60	124
61	129
62	135
63	143
64	148
65	155
66	164
67	170
68	177
69	187
70	194

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	2
7	2
8	2
9	3
10	3
11	3
12	4
13	4
14	5
15	6
16	6
17	7
18	8
19	8
20	9
21	11
22	11
23	12
24	14
25	14
26	15
27	17
28	18
29	19
30	22
31	23
32	24
33	27
34	28
35	30
36	33
37	35
38	37
39	40
40	42
41	44
42	48
43	50
44	53
45	58
46	60
47	63
48	68
49	71
50	74
51	80
52	84
53	87
54	93
55	97
56	101
57	107
58	112
59	117
60	124
61	129
62	135
63	143
64	148
65	155
66	164
67	170
68	177
69	187
70	194

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	2
7	2
8	2
9	3
10	3
11	3
12	4
13	4
14	5
15	6
16	6
17	7
18	8
19	8
20	9
21	11
22	11
23	12
24	14
25	14
26	15
27	17
28	18
29	19
30	22
31	23
32	24
33	27
34	28
35	30
36	33
37	35
38	37
39	40
40	42
41	44
42	48
43	50
44	53
45	58
46	60
47	63
48	68
49	71
50	74
51	80
52	84
53	87
54	93
55	97
56	101
57	107
58	112
59	117
60	124
61	129
62	135
63	143
64	148
65	155
66	164
67	170
68	177
69	187
70	194