A242378 - cp's OEIS frontend

A242378 Square array read by antidiagonals: to obtain A(i,j), replace each prime factor prime(k) in prime factorization of j with prime(k+i).

n	a(n)
0	0
1	1
2	0
3	2
4	1
5	0
6	3
7	3
8	1
9	0
10	4
11	5
12	5
13	1
14	0
15	5
16	9
17	7
18	7
19	1
20	0
21	6
22	7
23	25
24	11
25	11
26	1
27	0
28	7
29	15
30	11
31	49
32	13
33	13
34	1
35	0
36	8
37	11
38	35
39	13
40	121
41	17
42	17
43	1
44	0
45	9
46	27
47	13
48	77
49	17
50	169
51	19
52	19
53	1
54	0
55	10
56	25
57	125
58	17
59	143
60	19
61	289
62	23
63	23
64	1
65	0
66	11
67	21
68	49
69	343
70	19
71	221
72	23
73	361
74	29
75	29
76	1
77	0

[0, 1, 0, 2, 1, 0, 3, 3, 1, 0, 4, 5, 5, 1, 0, 5, 9, 7, 7, 1, 0, 6, 7, 25, 11, 11, 1, 0, 7, 15, 11, 49, 13, 13, 1, 0, 8, 11, 35, 13, 121, 17, 17, 1, 0, 9, 27, 13, 77, 17, 169, 19, 19, 1, 0, 10, 25, 125, 17, 143, 19, 289, 23, 23, 1, 0, 11, 21, 49, 343, 19, 221, 23, 361, 29, 29, 1, 0]

cp's OEIS Frontend

A242378 Square array read by antidiagonals: to obtain A(i,j), replace each prime factor prime(k) in prime factorization of j with prime(k+i).

Table of values

List of values

n	a(n)
0	0
1	1
2	0
3	2
4	1
5	0
6	3
7	3
8	1
9	0
10	4
11	5
12	5
13	1
14	0
15	5
16	9
17	7
18	7
19	1
20	0
21	6
22	7
23	25
24	11
25	11
26	1
27	0
28	7
29	15
30	11
31	49
32	13
33	13
34	1
35	0
36	8
37	11
38	35
39	13
40	121
41	17
42	17
43	1
44	0
45	9
46	27
47	13
48	77
49	17
50	169
51	19
52	19
53	1
54	0
55	10
56	25
57	125
58	17
59	143
60	19
61	289
62	23
63	23
64	1
65	0
66	11
67	21
68	49
69	343
70	19
71	221
72	23
73	361
74	29
75	29
76	1
77	0

n	a(n)
0	0
1	1
2	0
3	2
4	1
5	0
6	3
7	3
8	1
9	0
10	4
11	5
12	5
13	1
14	0
15	5
16	9
17	7
18	7
19	1
20	0
21	6
22	7
23	25
24	11
25	11
26	1
27	0
28	7
29	15
30	11
31	49
32	13
33	13
34	1
35	0
36	8
37	11
38	35
39	13
40	121
41	17
42	17
43	1
44	0
45	9
46	27
47	13
48	77
49	17
50	169
51	19
52	19
53	1
54	0
55	10
56	25
57	125
58	17
59	143
60	19
61	289
62	23
63	23
64	1
65	0
66	11
67	21
68	49
69	343
70	19
71	221
72	23
73	361
74	29
75	29
76	1
77	0

n	a(n)
0	0
1	1
2	0
3	2
4	1
5	0
6	3
7	3
8	1
9	0
10	4
11	5
12	5
13	1
14	0
15	5
16	9
17	7
18	7
19	1
20	0
21	6
22	7
23	25
24	11
25	11
26	1
27	0
28	7
29	15
30	11
31	49
32	13
33	13
34	1
35	0
36	8
37	11
38	35
39	13
40	121
41	17
42	17
43	1
44	0
45	9
46	27
47	13
48	77
49	17
50	169
51	19
52	19
53	1
54	0
55	10
56	25
57	125
58	17
59	143
60	19
61	289
62	23
63	23
64	1
65	0
66	11
67	21
68	49
69	343
70	19
71	221
72	23
73	361
74	29
75	29
76	1
77	0