A218890 - cp's OEIS frontend

A218890 T(n,k) = ((n + k - 1)(n + k - 2) - (-1 + (-1)^floor((n + k)/2))n + (1 +(-1)^floor((n + k)/2))*k)/2; n , k > 0, read by antidiagonals.

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

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

cp's OEIS Frontend

A218890 T(n,k) = ((n + k - 1)(n + k - 2) - (-1 + (-1)^floor((n + k)/2))n + (1 +(-1)^floor((n + k)/2))*k)/2; n , k > 0, read by antidiagonals.

Table of values

List of values

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

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

cp's OEIS Frontend

A218890 T(n,k) = ((n + k - 1)*(n + k - 2) - (-1 + (-1)^floor((n + k)/2))*n + (1 +(-1)^floor((n + k)/2))*k)/2; n , k > 0, read by antidiagonals.

Table of values

List of values

A218890 T(n,k) = ((n + k - 1)(n + k - 2) - (-1 + (-1)^floor((n + k)/2))n + (1 +(-1)^floor((n + k)/2))*k)/2; n , k > 0, read by antidiagonals.

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