A269851 - cp's OEIS frontend

A269851 a(0) = 1, a(A087686(1+n)) = 2*a(n), a(A088359(n)) = A250469(a(n)), where A088359 and A087686 = numbers that occur only once (resp. more than once) in A004001.

n	a(n)
0	1
1	2
2	4
3	3
4	8
5	9
6	5
7	6
8	16
9	21
10	25
11	7
12	18
13	15
14	10
15	12
16	32
17	45
18	55
19	49
20	11
21	42
22	51
23	35
24	50
25	27
26	14
27	36
28	33
29	30
30	20
31	24
32	64
33	93
34	115
35	91
36	121
37	13
38	90
39	123
40	125
41	77
42	110
43	147
44	65
45	98
46	39
47	22
48	84
49	105
50	85
51	102
52	87
53	70
54	100
55	57
56	54
57	28
58	72
59	69
60	66
61	60
62	40
63	48
64	128
65	189
66	235
67	203
68	187
69	169
70	17
71	186
72	267
73	305
74	217
75	143
76	230

[1, 2, 4, 3, 8, 9, 5, 6, 16, 21, 25, 7, 18, 15, 10, 12, 32, 45, 55, 49, 11, 42, 51, 35, 50, 27, 14, 36, 33, 30, 20, 24, 64, 93, 115, 91, 121, 13, 90, 123, 125, 77, 110, 147, 65, 98, 39, 22, 84, 105, 85, 102, 87, 70, 100, 57, 54, 28, 72, 69, 66, 60, 40, 48, 128, 189, 235, 203, 187, 169, 17, 186, 267, 305, 217, 143, 230]

cp's OEIS Frontend

A269851 a(0) = 1, a(A087686(1+n)) = 2*a(n), a(A088359(n)) = A250469(a(n)), where A088359 and A087686 = numbers that occur only once (resp. more than once) in A004001.

Table of values

List of values

n	a(n)
0	1
1	2
2	4
3	3
4	8
5	9
6	5
7	6
8	16
9	21
10	25
11	7
12	18
13	15
14	10
15	12
16	32
17	45
18	55
19	49
20	11
21	42
22	51
23	35
24	50
25	27
26	14
27	36
28	33
29	30
30	20
31	24
32	64
33	93
34	115
35	91
36	121
37	13
38	90
39	123
40	125
41	77
42	110
43	147
44	65
45	98
46	39
47	22
48	84
49	105
50	85
51	102
52	87
53	70
54	100
55	57
56	54
57	28
58	72
59	69
60	66
61	60
62	40
63	48
64	128
65	189
66	235
67	203
68	187
69	169
70	17
71	186
72	267
73	305
74	217
75	143
76	230

n	a(n)
0	1
1	2
2	4
3	3
4	8
5	9
6	5
7	6
8	16
9	21
10	25
11	7
12	18
13	15
14	10
15	12
16	32
17	45
18	55
19	49
20	11
21	42
22	51
23	35
24	50
25	27
26	14
27	36
28	33
29	30
30	20
31	24
32	64
33	93
34	115
35	91
36	121
37	13
38	90
39	123
40	125
41	77
42	110
43	147
44	65
45	98
46	39
47	22
48	84
49	105
50	85
51	102
52	87
53	70
54	100
55	57
56	54
57	28
58	72
59	69
60	66
61	60
62	40
63	48
64	128
65	189
66	235
67	203
68	187
69	169
70	17
71	186
72	267
73	305
74	217
75	143
76	230

n	a(n)
0	1
1	2
2	4
3	3
4	8
5	9
6	5
7	6
8	16
9	21
10	25
11	7
12	18
13	15
14	10
15	12
16	32
17	45
18	55
19	49
20	11
21	42
22	51
23	35
24	50
25	27
26	14
27	36
28	33
29	30
30	20
31	24
32	64
33	93
34	115
35	91
36	121
37	13
38	90
39	123
40	125
41	77
42	110
43	147
44	65
45	98
46	39
47	22
48	84
49	105
50	85
51	102
52	87
53	70
54	100
55	57
56	54
57	28
58	72
59	69
60	66
61	60
62	40
63	48
64	128
65	189
66	235
67	203
68	187
69	169
70	17
71	186
72	267
73	305
74	217
75	143
76	230