A257258 - cp's OEIS frontend

A257258 Square array A(row,col) = (1/2) * (A255127(row,col+1) - A255127(row,col)): half of the first differences of each row of Ludic array.

n	a(n)
1	1
2	1
3	3
4	1
5	3
6	7
7	1
8	3
9	8
10	12
11	1
12	3
13	7
14	14
15	22
16	1
17	3
18	8
19	13
20	24
21	30
22	1
23	3
24	7
25	14
26	24
27	30
28	42
29	1
30	3
31	8
32	12
33	26
34	32
35	43
36	61
37	1
38	3
39	7
40	13
41	24
42	33
43	47
44	63
45	71
46	1
47	3
48	8
49	14
50	24
51	31
52	43
53	66
54	72
55	88
56	1
57	3
58	7
59	13
60	22
61	30
62	47
63	60
64	73
65	83
66	108
67	1
68	3
69	8
70	12
71	24
72	32
73	43
74	66
75	71
76	90
77	117
78	126

[1, 1, 3, 1, 3, 7, 1, 3, 8, 12, 1, 3, 7, 14, 22, 1, 3, 8, 13, 24, 30, 1, 3, 7, 14, 24, 30, 42, 1, 3, 8, 12, 26, 32, 43, 61, 1, 3, 7, 13, 24, 33, 47, 63, 71, 1, 3, 8, 14, 24, 31, 43, 66, 72, 88, 1, 3, 7, 13, 22, 30, 47, 60, 73, 83, 108, 1, 3, 8, 12, 24, 32, 43, 66, 71, 90, 117, 126]

cp's OEIS Frontend

A257258 Square array A(row,col) = (1/2) * (A255127(row,col+1) - A255127(row,col)): half of the first differences of each row of Ludic array.

Table of values

List of values

n	a(n)
1	1
2	1
3	3
4	1
5	3
6	7
7	1
8	3
9	8
10	12
11	1
12	3
13	7
14	14
15	22
16	1
17	3
18	8
19	13
20	24
21	30
22	1
23	3
24	7
25	14
26	24
27	30
28	42
29	1
30	3
31	8
32	12
33	26
34	32
35	43
36	61
37	1
38	3
39	7
40	13
41	24
42	33
43	47
44	63
45	71
46	1
47	3
48	8
49	14
50	24
51	31
52	43
53	66
54	72
55	88
56	1
57	3
58	7
59	13
60	22
61	30
62	47
63	60
64	73
65	83
66	108
67	1
68	3
69	8
70	12
71	24
72	32
73	43
74	66
75	71
76	90
77	117
78	126

n	a(n)
1	1
2	1
3	3
4	1
5	3
6	7
7	1
8	3
9	8
10	12
11	1
12	3
13	7
14	14
15	22
16	1
17	3
18	8
19	13
20	24
21	30
22	1
23	3
24	7
25	14
26	24
27	30
28	42
29	1
30	3
31	8
32	12
33	26
34	32
35	43
36	61
37	1
38	3
39	7
40	13
41	24
42	33
43	47
44	63
45	71
46	1
47	3
48	8
49	14
50	24
51	31
52	43
53	66
54	72
55	88
56	1
57	3
58	7
59	13
60	22
61	30
62	47
63	60
64	73
65	83
66	108
67	1
68	3
69	8
70	12
71	24
72	32
73	43
74	66
75	71
76	90
77	117
78	126

n	a(n)
1	1
2	1
3	3
4	1
5	3
6	7
7	1
8	3
9	8
10	12
11	1
12	3
13	7
14	14
15	22
16	1
17	3
18	8
19	13
20	24
21	30
22	1
23	3
24	7
25	14
26	24
27	30
28	42
29	1
30	3
31	8
32	12
33	26
34	32
35	43
36	61
37	1
38	3
39	7
40	13
41	24
42	33
43	47
44	63
45	71
46	1
47	3
48	8
49	14
50	24
51	31
52	43
53	66
54	72
55	88
56	1
57	3
58	7
59	13
60	22
61	30
62	47
63	60
64	73
65	83
66	108
67	1
68	3
69	8
70	12
71	24
72	32
73	43
74	66
75	71
76	90
77	117
78	126