A121511 - cp's OEIS frontend

A121511 a(n) = a(n-1) + a(n-4) - a(n-5).

n	a(n)
1	1
2	5
3	13
4	25
5	5
6	9
7	17
8	29
9	9
10	13
11	21
12	33
13	13
14	17
15	25
16	37
17	17
18	21
19	29
20	41
21	21
22	25
23	33
24	45
25	25
26	29
27	37
28	49
29	29
30	33
31	41
32	53
33	33
34	37
35	45
36	57
37	37
38	41
39	49
40	61
41	41
42	45
43	53
44	65
45	45
46	49
47	57
48	69
49	49
50	53
51	61
52	73
53	53
54	57
55	65
56	77
57	57
58	61
59	69
60	81
61	61
62	65
63	73
64	85
65	65
66	69
67	77

[1, 5, 13, 25, 5, 9, 17, 29, 9, 13, 21, 33, 13, 17, 25, 37, 17, 21, 29, 41, 21, 25, 33, 45, 25, 29, 37, 49, 29, 33, 41, 53, 33, 37, 45, 57, 37, 41, 49, 61, 41, 45, 53, 65, 45, 49, 57, 69, 49, 53, 61, 73, 53, 57, 65, 77, 57, 61, 69, 81, 61, 65, 73, 85, 65, 69, 77]

cp's OEIS Frontend

A121511 a(n) = a(n-1) + a(n-4) - a(n-5).

Table of values

List of values

n	a(n)
1	1
2	5
3	13
4	25
5	5
6	9
7	17
8	29
9	9
10	13
11	21
12	33
13	13
14	17
15	25
16	37
17	17
18	21
19	29
20	41
21	21
22	25
23	33
24	45
25	25
26	29
27	37
28	49
29	29
30	33
31	41
32	53
33	33
34	37
35	45
36	57
37	37
38	41
39	49
40	61
41	41
42	45
43	53
44	65
45	45
46	49
47	57
48	69
49	49
50	53
51	61
52	73
53	53
54	57
55	65
56	77
57	57
58	61
59	69
60	81
61	61
62	65
63	73
64	85
65	65
66	69
67	77

n	a(n)
1	1
2	5
3	13
4	25
5	5
6	9
7	17
8	29
9	9
10	13
11	21
12	33
13	13
14	17
15	25
16	37
17	17
18	21
19	29
20	41
21	21
22	25
23	33
24	45
25	25
26	29
27	37
28	49
29	29
30	33
31	41
32	53
33	33
34	37
35	45
36	57
37	37
38	41
39	49
40	61
41	41
42	45
43	53
44	65
45	45
46	49
47	57
48	69
49	49
50	53
51	61
52	73
53	53
54	57
55	65
56	77
57	57
58	61
59	69
60	81
61	61
62	65
63	73
64	85
65	65
66	69
67	77

n	a(n)
1	1
2	5
3	13
4	25
5	5
6	9
7	17
8	29
9	9
10	13
11	21
12	33
13	13
14	17
15	25
16	37
17	17
18	21
19	29
20	41
21	21
22	25
23	33
24	45
25	25
26	29
27	37
28	49
29	29
30	33
31	41
32	53
33	33
34	37
35	45
36	57
37	37
38	41
39	49
40	61
41	41
42	45
43	53
44	65
45	45
46	49
47	57
48	69
49	49
50	53
51	61
52	73
53	53
54	57
55	65
56	77
57	57
58	61
59	69
60	81
61	61
62	65
63	73
64	85
65	65
66	69
67	77