A240828 - cp's OEIS frontend

A240828 a(1)=a(2)=0, a(3)=2; thereafter a(n) = Sum( a(n-i-s-a(n-i-1)), i=0..k-1 ), where s=0, k=3.

n	a(n)
1	0
2	0
3	2
4	2
5	4
6	2
7	6
8	4
9	8
10	4
11	10
12	6
13	12
14	6
15	14
16	8
17	16
18	8
19	18
20	10
21	20
22	10
23	22
24	12
25	24
26	12
27	26
28	14
29	28
30	14
31	30
32	16
33	32
34	16
35	34
36	18
37	36
38	18
39	38
40	20
41	40
42	20
43	42
44	22
45	44
46	22
47	46
48	24
49	48
50	24
51	50
52	26
53	52
54	26
55	54
56	28
57	56
58	28
59	58
60	30
61	60
62	30
63	62
64	32
65	64
66	32
67	66
68	34
69	68
70	34
71	70
72	36
73	72
74	36
75	74
76	38
77	76
78	38
79	78
80	40
81	80
82	40

[0, 0, 2, 2, 4, 2, 6, 4, 8, 4, 10, 6, 12, 6, 14, 8, 16, 8, 18, 10, 20, 10, 22, 12, 24, 12, 26, 14, 28, 14, 30, 16, 32, 16, 34, 18, 36, 18, 38, 20, 40, 20, 42, 22, 44, 22, 46, 24, 48, 24, 50, 26, 52, 26, 54, 28, 56, 28, 58, 30, 60, 30, 62, 32, 64, 32, 66, 34, 68, 34, 70, 36, 72, 36, 74, 38, 76, 38, 78, 40, 80, 40]

cp's OEIS Frontend

A240828 a(1)=a(2)=0, a(3)=2; thereafter a(n) = Sum( a(n-i-s-a(n-i-1)), i=0..k-1 ), where s=0, k=3.

Table of values

List of values

n	a(n)
1	0
2	0
3	2
4	2
5	4
6	2
7	6
8	4
9	8
10	4
11	10
12	6
13	12
14	6
15	14
16	8
17	16
18	8
19	18
20	10
21	20
22	10
23	22
24	12
25	24
26	12
27	26
28	14
29	28
30	14
31	30
32	16
33	32
34	16
35	34
36	18
37	36
38	18
39	38
40	20
41	40
42	20
43	42
44	22
45	44
46	22
47	46
48	24
49	48
50	24
51	50
52	26
53	52
54	26
55	54
56	28
57	56
58	28
59	58
60	30
61	60
62	30
63	62
64	32
65	64
66	32
67	66
68	34
69	68
70	34
71	70
72	36
73	72
74	36
75	74
76	38
77	76
78	38
79	78
80	40
81	80
82	40

n	a(n)
1	0
2	0
3	2
4	2
5	4
6	2
7	6
8	4
9	8
10	4
11	10
12	6
13	12
14	6
15	14
16	8
17	16
18	8
19	18
20	10
21	20
22	10
23	22
24	12
25	24
26	12
27	26
28	14
29	28
30	14
31	30
32	16
33	32
34	16
35	34
36	18
37	36
38	18
39	38
40	20
41	40
42	20
43	42
44	22
45	44
46	22
47	46
48	24
49	48
50	24
51	50
52	26
53	52
54	26
55	54
56	28
57	56
58	28
59	58
60	30
61	60
62	30
63	62
64	32
65	64
66	32
67	66
68	34
69	68
70	34
71	70
72	36
73	72
74	36
75	74
76	38
77	76
78	38
79	78
80	40
81	80
82	40

n	a(n)
1	0
2	0
3	2
4	2
5	4
6	2
7	6
8	4
9	8
10	4
11	10
12	6
13	12
14	6
15	14
16	8
17	16
18	8
19	18
20	10
21	20
22	10
23	22
24	12
25	24
26	12
27	26
28	14
29	28
30	14
31	30
32	16
33	32
34	16
35	34
36	18
37	36
38	18
39	38
40	20
41	40
42	20
43	42
44	22
45	44
46	22
47	46
48	24
49	48
50	24
51	50
52	26
53	52
54	26
55	54
56	28
57	56
58	28
59	58
60	30
61	60
62	30
63	62
64	32
65	64
66	32
67	66
68	34
69	68
70	34
71	70
72	36
73	72
74	36
75	74
76	38
77	76
78	38
79	78
80	40
81	80
82	40