A385406 - cp's OEIS frontend

A385406 Triangle read by rows: T(n, k) = n(n+1)/2 - floor((n-1)/2) - (-1)^k floor(k/2).

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

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

cp's OEIS Frontend

A385406 Triangle read by rows: T(n, k) = n(n+1)/2 - floor((n-1)/2) - (-1)^k floor(k/2).

Table of values

List of values

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

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

cp's OEIS Frontend

A385406 Triangle read by rows: T(n, k) = n*(n+1)/2 - floor((n-1)/2) - (-1)^k * floor(k/2).

Table of values

List of values

A385406 Triangle read by rows: T(n, k) = n(n+1)/2 - floor((n-1)/2) - (-1)^k floor(k/2).

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