A240829 - cp's OEIS frontend

A240829 a(1)=-1, a(2)=0, a(3)=1; 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	-1
2	0
3	1
4	3
5	2
6	4
7	4
8	7
9	4
10	7
11	7
12	9
13	8
14	9
15	11
16	10
17	10
18	13
19	15
20	13
21	13
22	13
23	18
24	15
25	18
26	18
27	18
28	18
29	18
30	23
31	23
32	20
33	19
34	23
35	28
36	27
37	23
38	25
39	27
40	28
41	25
42	26
43	28
44	30
45	31
46	32
47	33
48	33
49	32
50	34
51	33
52	38
53	36
54	39
55	34
56	36
57	36
58	39
59	39
60	39
61	39
62	44
63	46
64	46
65	43
66	46
67	46
68	44
69	44
70	49
71	49
72	49
73	46
74	51
75	48
76	51
77	51
78	54
79	54
80	54
81	54
82	54

[-1, 0, 1, 3, 2, 4, 4, 7, 4, 7, 7, 9, 8, 9, 11, 10, 10, 13, 15, 13, 13, 13, 18, 15, 18, 18, 18, 18, 18, 23, 23, 20, 19, 23, 28, 27, 23, 25, 27, 28, 25, 26, 28, 30, 31, 32, 33, 33, 32, 34, 33, 38, 36, 39, 34, 36, 36, 39, 39, 39, 39, 44, 46, 46, 43, 46, 46, 44, 44, 49, 49, 49, 46, 51, 48, 51, 51, 54, 54, 54, 54, 54]

cp's OEIS Frontend

A240829 a(1)=-1, a(2)=0, a(3)=1; 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	-1
2	0
3	1
4	3
5	2
6	4
7	4
8	7
9	4
10	7
11	7
12	9
13	8
14	9
15	11
16	10
17	10
18	13
19	15
20	13
21	13
22	13
23	18
24	15
25	18
26	18
27	18
28	18
29	18
30	23
31	23
32	20
33	19
34	23
35	28
36	27
37	23
38	25
39	27
40	28
41	25
42	26
43	28
44	30
45	31
46	32
47	33
48	33
49	32
50	34
51	33
52	38
53	36
54	39
55	34
56	36
57	36
58	39
59	39
60	39
61	39
62	44
63	46
64	46
65	43
66	46
67	46
68	44
69	44
70	49
71	49
72	49
73	46
74	51
75	48
76	51
77	51
78	54
79	54
80	54
81	54
82	54

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

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