A309559 - cp's OEIS frontend

A309559 Triangle read by rows: T(n,k) = 1 + n + k^2/2 - k/2 + k*(n-k), n >= 0, 0 <= k <= n.

n	a(n)
0	1
1	2
2	2
3	3
4	4
5	4
6	4
7	6
8	7
9	7
10	5
11	8
12	10
13	11
14	11
15	6
16	10
17	13
18	15
19	16
20	16
21	7
22	12
23	16
24	19
25	21
26	22
27	22
28	8
29	14
30	19
31	23
32	26
33	28
34	29
35	29
36	9
37	16
38	22
39	27
40	31
41	34
42	36
43	37
44	37
45	10
46	18
47	25
48	31
49	36
50	40
51	43
52	45
53	46
54	46
55	11
56	20
57	28
58	35
59	41
60	46
61	50
62	53
63	55
64	56
65	56
66	12
67	22
68	31
69	39
70	46
71	52
72	57
73	61
74	64
75	66
76	67
77	67
78	13
79	24
80	34
81	43
82	51
83	58
84	64
85	69
86	73
87	76
88	78
89	79
90	79

[1, 2, 2, 3, 4, 4, 4, 6, 7, 7, 5, 8, 10, 11, 11, 6, 10, 13, 15, 16, 16, 7, 12, 16, 19, 21, 22, 22, 8, 14, 19, 23, 26, 28, 29, 29, 9, 16, 22, 27, 31, 34, 36, 37, 37, 10, 18, 25, 31, 36, 40, 43, 45, 46, 46, 11, 20, 28, 35, 41, 46, 50, 53, 55, 56, 56, 12, 22, 31, 39, 46, 52, 57, 61, 64, 66, 67, 67, 13, 24, 34, 43, 51, 58, 64, 69, 73, 76, 78, 79, 79]

cp's OEIS Frontend

A309559 Triangle read by rows: T(n,k) = 1 + n + k^2/2 - k/2 + k*(n-k), n >= 0, 0 <= k <= n.

Table of values

List of values

n	a(n)
0	1
1	2
2	2
3	3
4	4
5	4
6	4
7	6
8	7
9	7
10	5
11	8
12	10
13	11
14	11
15	6
16	10
17	13
18	15
19	16
20	16
21	7
22	12
23	16
24	19
25	21
26	22
27	22
28	8
29	14
30	19
31	23
32	26
33	28
34	29
35	29
36	9
37	16
38	22
39	27
40	31
41	34
42	36
43	37
44	37
45	10
46	18
47	25
48	31
49	36
50	40
51	43
52	45
53	46
54	46
55	11
56	20
57	28
58	35
59	41
60	46
61	50
62	53
63	55
64	56
65	56
66	12
67	22
68	31
69	39
70	46
71	52
72	57
73	61
74	64
75	66
76	67
77	67
78	13
79	24
80	34
81	43
82	51
83	58
84	64
85	69
86	73
87	76
88	78
89	79
90	79

n	a(n)
0	1
1	2
2	2
3	3
4	4
5	4
6	4
7	6
8	7
9	7
10	5
11	8
12	10
13	11
14	11
15	6
16	10
17	13
18	15
19	16
20	16
21	7
22	12
23	16
24	19
25	21
26	22
27	22
28	8
29	14
30	19
31	23
32	26
33	28
34	29
35	29
36	9
37	16
38	22
39	27
40	31
41	34
42	36
43	37
44	37
45	10
46	18
47	25
48	31
49	36
50	40
51	43
52	45
53	46
54	46
55	11
56	20
57	28
58	35
59	41
60	46
61	50
62	53
63	55
64	56
65	56
66	12
67	22
68	31
69	39
70	46
71	52
72	57
73	61
74	64
75	66
76	67
77	67
78	13
79	24
80	34
81	43
82	51
83	58
84	64
85	69
86	73
87	76
88	78
89	79
90	79

n	a(n)
0	1
1	2
2	2
3	3
4	4
5	4
6	4
7	6
8	7
9	7
10	5
11	8
12	10
13	11
14	11
15	6
16	10
17	13
18	15
19	16
20	16
21	7
22	12
23	16
24	19
25	21
26	22
27	22
28	8
29	14
30	19
31	23
32	26
33	28
34	29
35	29
36	9
37	16
38	22
39	27
40	31
41	34
42	36
43	37
44	37
45	10
46	18
47	25
48	31
49	36
50	40
51	43
52	45
53	46
54	46
55	11
56	20
57	28
58	35
59	41
60	46
61	50
62	53
63	55
64	56
65	56
66	12
67	22
68	31
69	39
70	46
71	52
72	57
73	61
74	64
75	66
76	67
77	67
78	13
79	24
80	34
81	43
82	51
83	58
84	64
85	69
86	73
87	76
88	78
89	79
90	79