A144204 - cp's OEIS frontend

A144204 Array A(k,n) = (n+k-2)*(n-1) - 1 (k >= 1, n >= 1) read by antidiagonals.

n	a(n)
1	-1
2	-1
3	0
4	-1
5	1
6	3
7	-1
8	2
9	5
10	8
11	-1
12	3
13	7
14	11
15	15
16	-1
17	4
18	9
19	14
20	19
21	24
22	-1
23	5
24	11
25	17
26	23
27	29
28	35
29	-1
30	6
31	13
32	20
33	27
34	34
35	41
36	48
37	-1
38	7
39	15
40	23
41	31
42	39
43	47
44	55
45	63
46	-1
47	8
48	17
49	26
50	35
51	44
52	53
53	62
54	71
55	80
56	-1
57	9
58	19
59	29
60	39
61	49
62	59
63	69
64	79
65	89
66	99
67	-1
68	10
69	21
70	32
71	43
72	54
73	65
74	76
75	87

[-1, -1, 0, -1, 1, 3, -1, 2, 5, 8, -1, 3, 7, 11, 15, -1, 4, 9, 14, 19, 24, -1, 5, 11, 17, 23, 29, 35, -1, 6, 13, 20, 27, 34, 41, 48, -1, 7, 15, 23, 31, 39, 47, 55, 63, -1, 8, 17, 26, 35, 44, 53, 62, 71, 80, -1, 9, 19, 29, 39, 49, 59, 69, 79, 89, 99, -1, 10, 21, 32, 43, 54, 65, 76, 87]

cp's OEIS Frontend

A144204 Array A(k,n) = (n+k-2)*(n-1) - 1 (k >= 1, n >= 1) read by antidiagonals.

Table of values

List of values

n	a(n)
1	-1
2	-1
3	0
4	-1
5	1
6	3
7	-1
8	2
9	5
10	8
11	-1
12	3
13	7
14	11
15	15
16	-1
17	4
18	9
19	14
20	19
21	24
22	-1
23	5
24	11
25	17
26	23
27	29
28	35
29	-1
30	6
31	13
32	20
33	27
34	34
35	41
36	48
37	-1
38	7
39	15
40	23
41	31
42	39
43	47
44	55
45	63
46	-1
47	8
48	17
49	26
50	35
51	44
52	53
53	62
54	71
55	80
56	-1
57	9
58	19
59	29
60	39
61	49
62	59
63	69
64	79
65	89
66	99
67	-1
68	10
69	21
70	32
71	43
72	54
73	65
74	76
75	87

n	a(n)
1	-1
2	-1
3	0
4	-1
5	1
6	3
7	-1
8	2
9	5
10	8
11	-1
12	3
13	7
14	11
15	15
16	-1
17	4
18	9
19	14
20	19
21	24
22	-1
23	5
24	11
25	17
26	23
27	29
28	35
29	-1
30	6
31	13
32	20
33	27
34	34
35	41
36	48
37	-1
38	7
39	15
40	23
41	31
42	39
43	47
44	55
45	63
46	-1
47	8
48	17
49	26
50	35
51	44
52	53
53	62
54	71
55	80
56	-1
57	9
58	19
59	29
60	39
61	49
62	59
63	69
64	79
65	89
66	99
67	-1
68	10
69	21
70	32
71	43
72	54
73	65
74	76
75	87

n	a(n)
1	-1
2	-1
3	0
4	-1
5	1
6	3
7	-1
8	2
9	5
10	8
11	-1
12	3
13	7
14	11
15	15
16	-1
17	4
18	9
19	14
20	19
21	24
22	-1
23	5
24	11
25	17
26	23
27	29
28	35
29	-1
30	6
31	13
32	20
33	27
34	34
35	41
36	48
37	-1
38	7
39	15
40	23
41	31
42	39
43	47
44	55
45	63
46	-1
47	8
48	17
49	26
50	35
51	44
52	53
53	62
54	71
55	80
56	-1
57	9
58	19
59	29
60	39
61	49
62	59
63	69
64	79
65	89
66	99
67	-1
68	10
69	21
70	32
71	43
72	54
73	65
74	76
75	87