A126890 - cp's OEIS frontend

A126890 Triangle read by rows: T(n,k) = n(n+2k+1)/2, 0 <= k <= n.

n	a(n)
0	0
1	1
2	2
3	3
4	5
5	7
6	6
7	9
8	12
9	15
10	10
11	14
12	18
13	22
14	26
15	15
16	20
17	25
18	30
19	35
20	40
21	21
22	27
23	33
24	39
25	45
26	51
27	57
28	28
29	35
30	42
31	49
32	56
33	63
34	70
35	77
36	36
37	44
38	52
39	60
40	68
41	76
42	84
43	92
44	100
45	45
46	54
47	63
48	72
49	81
50	90
51	99
52	108
53	117
54	126
55	55
56	65
57	75
58	85
59	95
60	105
61	115
62	125
63	135
64	145
65	155
66	66
67	77
68	88

[0, 1, 2, 3, 5, 7, 6, 9, 12, 15, 10, 14, 18, 22, 26, 15, 20, 25, 30, 35, 40, 21, 27, 33, 39, 45, 51, 57, 28, 35, 42, 49, 56, 63, 70, 77, 36, 44, 52, 60, 68, 76, 84, 92, 100, 45, 54, 63, 72, 81, 90, 99, 108, 117, 126, 55, 65, 75, 85, 95, 105, 115, 125, 135, 145, 155, 66, 77, 88]

cp's OEIS Frontend

A126890 Triangle read by rows: T(n,k) = n(n+2k+1)/2, 0 <= k <= n.

Table of values

List of values

n	a(n)
0	0
1	1
2	2
3	3
4	5
5	7
6	6
7	9
8	12
9	15
10	10
11	14
12	18
13	22
14	26
15	15
16	20
17	25
18	30
19	35
20	40
21	21
22	27
23	33
24	39
25	45
26	51
27	57
28	28
29	35
30	42
31	49
32	56
33	63
34	70
35	77
36	36
37	44
38	52
39	60
40	68
41	76
42	84
43	92
44	100
45	45
46	54
47	63
48	72
49	81
50	90
51	99
52	108
53	117
54	126
55	55
56	65
57	75
58	85
59	95
60	105
61	115
62	125
63	135
64	145
65	155
66	66
67	77
68	88

n	a(n)
0	0
1	1
2	2
3	3
4	5
5	7
6	6
7	9
8	12
9	15
10	10
11	14
12	18
13	22
14	26
15	15
16	20
17	25
18	30
19	35
20	40
21	21
22	27
23	33
24	39
25	45
26	51
27	57
28	28
29	35
30	42
31	49
32	56
33	63
34	70
35	77
36	36
37	44
38	52
39	60
40	68
41	76
42	84
43	92
44	100
45	45
46	54
47	63
48	72
49	81
50	90
51	99
52	108
53	117
54	126
55	55
56	65
57	75
58	85
59	95
60	105
61	115
62	125
63	135
64	145
65	155
66	66
67	77
68	88

cp's OEIS Frontend

A126890 Triangle read by rows: T(n,k) = n*(n+2*k+1)/2, 0 <= k <= n.

Table of values

List of values

A126890 Triangle read by rows: T(n,k) = n(n+2k+1)/2, 0 <= k <= n.

n	a(n)
0	0
1	1
2	2
3	3
4	5
5	7
6	6
7	9
8	12
9	15
10	10
11	14
12	18
13	22
14	26
15	15
16	20
17	25
18	30
19	35
20	40
21	21
22	27
23	33
24	39
25	45
26	51
27	57
28	28
29	35
30	42
31	49
32	56
33	63
34	70
35	77
36	36
37	44
38	52
39	60
40	68
41	76
42	84
43	92
44	100
45	45
46	54
47	63
48	72
49	81
50	90
51	99
52	108
53	117
54	126
55	55
56	65
57	75
58	85
59	95
60	105
61	115
62	125
63	135
64	145
65	155
66	66
67	77
68	88