A337940 - cp's OEIS frontend

A337940 Triangle read by rows: T(n, k) = T(n+2) - T(n-k), with the triangular numbers T = A000217, for n >= 1, k = 1, 2, ..., n.

n	a(n)
1	6
2	9
3	10
4	12
5	14
6	15
7	15
8	18
9	20
10	21
11	18
12	22
13	25
14	27
15	28
16	21
17	26
18	30
19	33
20	35
21	36
22	24
23	30
24	35
25	39
26	42
27	44
28	45
29	27
30	34
31	40
32	45
33	49
34	52
35	54
36	55
37	30
38	38
39	45
40	51
41	56
42	60
43	63
44	65
45	66
46	33
47	42
48	50
49	57
50	63
51	68
52	72
53	75
54	77
55	78
56	36
57	46
58	55
59	63
60	70
61	76
62	81
63	85
64	88
65	90
66	91

[6, 9, 10, 12, 14, 15, 15, 18, 20, 21, 18, 22, 25, 27, 28, 21, 26, 30, 33, 35, 36, 24, 30, 35, 39, 42, 44, 45, 27, 34, 40, 45, 49, 52, 54, 55, 30, 38, 45, 51, 56, 60, 63, 65, 66, 33, 42, 50, 57, 63, 68, 72, 75, 77, 78, 36, 46, 55, 63, 70, 76, 81, 85, 88, 90, 91]

cp's OEIS Frontend

A337940 Triangle read by rows: T(n, k) = T(n+2) - T(n-k), with the triangular numbers T = A000217, for n >= 1, k = 1, 2, ..., n.

Table of values

List of values

n	a(n)
1	6
2	9
3	10
4	12
5	14
6	15
7	15
8	18
9	20
10	21
11	18
12	22
13	25
14	27
15	28
16	21
17	26
18	30
19	33
20	35
21	36
22	24
23	30
24	35
25	39
26	42
27	44
28	45
29	27
30	34
31	40
32	45
33	49
34	52
35	54
36	55
37	30
38	38
39	45
40	51
41	56
42	60
43	63
44	65
45	66
46	33
47	42
48	50
49	57
50	63
51	68
52	72
53	75
54	77
55	78
56	36
57	46
58	55
59	63
60	70
61	76
62	81
63	85
64	88
65	90
66	91

n	a(n)
1	6
2	9
3	10
4	12
5	14
6	15
7	15
8	18
9	20
10	21
11	18
12	22
13	25
14	27
15	28
16	21
17	26
18	30
19	33
20	35
21	36
22	24
23	30
24	35
25	39
26	42
27	44
28	45
29	27
30	34
31	40
32	45
33	49
34	52
35	54
36	55
37	30
38	38
39	45
40	51
41	56
42	60
43	63
44	65
45	66
46	33
47	42
48	50
49	57
50	63
51	68
52	72
53	75
54	77
55	78
56	36
57	46
58	55
59	63
60	70
61	76
62	81
63	85
64	88
65	90
66	91

n	a(n)
1	6
2	9
3	10
4	12
5	14
6	15
7	15
8	18
9	20
10	21
11	18
12	22
13	25
14	27
15	28
16	21
17	26
18	30
19	33
20	35
21	36
22	24
23	30
24	35
25	39
26	42
27	44
28	45
29	27
30	34
31	40
32	45
33	49
34	52
35	54
36	55
37	30
38	38
39	45
40	51
41	56
42	60
43	63
44	65
45	66
46	33
47	42
48	50
49	57
50	63
51	68
52	72
53	75
54	77
55	78
56	36
57	46
58	55
59	63
60	70
61	76
62	81
63	85
64	88
65	90
66	91