A014132 - cp's OEIS frontend

A014132 Complement of triangular numbers (A000217); also array T(n,k) = ((n+k)^2 + n-k)/2, n, k > 0, read by antidiagonals.

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

[2, 4, 5, 7, 8, 9, 11, 12, 13, 14, 16, 17, 18, 19, 20, 22, 23, 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 46, 47, 48, 49, 50, 51, 52, 53, 54, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 79]

cp's OEIS Frontend

A014132 Complement of triangular numbers (A000217); also array T(n,k) = ((n+k)^2 + n-k)/2, n, k > 0, read by antidiagonals.

Table of values

List of values

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

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

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