A246696 - cp's OEIS frontend

A246696 Triangle t(n,k) = t(n,k-2) + 2 if n > 1 and 2 <= k <= n; t(0,0) = 1, t(1,0) = 2, t(1,1) = 3; if n > 1 is odd, then t(n,0) = t(n-1,n-2) + 2 and t(n,1) = t(n-1,n-1) + 2; if n > 1 is even, then t(n,0) = t(n-1,n-1) + 2 and t(n,1) = t(n-1,n-2) + 2.

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

[1, 2, 3, 5, 4, 7, 6, 9, 8, 11, 13, 10, 15, 12, 17, 14, 19, 16, 21, 18, 23, 25, 20, 27, 22, 29, 24, 31, 26, 33, 28, 35, 30, 37, 32, 39, 41, 34, 43, 36, 45, 38, 47, 40, 49, 42, 51, 44, 53, 46, 55, 48, 57, 50, 59, 61, 52, 63, 54, 65, 56, 67, 58, 69, 60, 71, 62]

cp's OEIS Frontend

A246696 Triangle t(n,k) = t(n,k-2) + 2 if n > 1 and 2 <= k <= n; t(0,0) = 1, t(1,0) = 2, t(1,1) = 3; if n > 1 is odd, then t(n,0) = t(n-1,n-2) + 2 and t(n,1) = t(n-1,n-1) + 2; if n > 1 is even, then t(n,0) = t(n-1,n-1) + 2 and t(n,1) = t(n-1,n-2) + 2.

Table of values

List of values

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

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

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