A131508 - cp's OEIS frontend

A131508 2*A000027 (natural numbers) sandwiched by tripled A001477 (nonnegative numbers).

n	a(n)
0	0
1	0
2	0
3	2
4	1
5	1
6	1
7	4
8	2
9	2
10	2
11	6
12	3
13	3
14	3
15	8
16	4
17	4
18	4
19	10
20	5
21	5
22	5
23	12
24	6
25	6
26	6
27	14
28	7
29	7
30	7
31	16
32	8
33	8
34	8
35	18
36	9
37	9
38	9
39	20
40	10
41	10
42	10
43	22
44	11
45	11
46	11
47	24
48	12
49	12
50	12
51	26
52	13
53	13
54	13
55	28
56	14
57	14
58	14
59	30
60	15
61	15
62	15
63	32
64	16
65	16
66	16
67	34
68	17
69	17
70	17
71	36
72	18
73	18
74	18
75	38
76	19
77	19
78	19
79	40
80	20

[0, 0, 0, 2, 1, 1, 1, 4, 2, 2, 2, 6, 3, 3, 3, 8, 4, 4, 4, 10, 5, 5, 5, 12, 6, 6, 6, 14, 7, 7, 7, 16, 8, 8, 8, 18, 9, 9, 9, 20, 10, 10, 10, 22, 11, 11, 11, 24, 12, 12, 12, 26, 13, 13, 13, 28, 14, 14, 14, 30, 15, 15, 15, 32, 16, 16, 16, 34, 17, 17, 17, 36, 18, 18, 18, 38, 19, 19, 19, 40, 20]

cp's OEIS Frontend

A131508 2*A000027 (natural numbers) sandwiched by tripled A001477 (nonnegative numbers).

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	2
4	1
5	1
6	1
7	4
8	2
9	2
10	2
11	6
12	3
13	3
14	3
15	8
16	4
17	4
18	4
19	10
20	5
21	5
22	5
23	12
24	6
25	6
26	6
27	14
28	7
29	7
30	7
31	16
32	8
33	8
34	8
35	18
36	9
37	9
38	9
39	20
40	10
41	10
42	10
43	22
44	11
45	11
46	11
47	24
48	12
49	12
50	12
51	26
52	13
53	13
54	13
55	28
56	14
57	14
58	14
59	30
60	15
61	15
62	15
63	32
64	16
65	16
66	16
67	34
68	17
69	17
70	17
71	36
72	18
73	18
74	18
75	38
76	19
77	19
78	19
79	40
80	20

n	a(n)
0	0
1	0
2	0
3	2
4	1
5	1
6	1
7	4
8	2
9	2
10	2
11	6
12	3
13	3
14	3
15	8
16	4
17	4
18	4
19	10
20	5
21	5
22	5
23	12
24	6
25	6
26	6
27	14
28	7
29	7
30	7
31	16
32	8
33	8
34	8
35	18
36	9
37	9
38	9
39	20
40	10
41	10
42	10
43	22
44	11
45	11
46	11
47	24
48	12
49	12
50	12
51	26
52	13
53	13
54	13
55	28
56	14
57	14
58	14
59	30
60	15
61	15
62	15
63	32
64	16
65	16
66	16
67	34
68	17
69	17
70	17
71	36
72	18
73	18
74	18
75	38
76	19
77	19
78	19
79	40
80	20

n	a(n)
0	0
1	0
2	0
3	2
4	1
5	1
6	1
7	4
8	2
9	2
10	2
11	6
12	3
13	3
14	3
15	8
16	4
17	4
18	4
19	10
20	5
21	5
22	5
23	12
24	6
25	6
26	6
27	14
28	7
29	7
30	7
31	16
32	8
33	8
34	8
35	18
36	9
37	9
38	9
39	20
40	10
41	10
42	10
43	22
44	11
45	11
46	11
47	24
48	12
49	12
50	12
51	26
52	13
53	13
54	13
55	28
56	14
57	14
58	14
59	30
60	15
61	15
62	15
63	32
64	16
65	16
66	16
67	34
68	17
69	17
70	17
71	36
72	18
73	18
74	18
75	38
76	19
77	19
78	19
79	40
80	20