A346778 - cp's OEIS frontend

A346778 Least k >= 1 such that {b(1), b(2), ..., b(k)} = {n, n-1, ..., n-k+1} and b(k+1) = n-k where b(1..n) is row n of A088643, or k = 0 if no such k >= 1 exists.

n	a(n)
1	0
2	1
3	1
4	1
5	4
6	1
7	1
8	4
9	1
10	1
11	4
12	1
13	6
14	12
15	1
16	1
17	4
18	6
19	1
20	8
21	1
22	1
23	4
24	1
25	6
26	22
27	1
28	9
29	10
30	1
31	1
32	4
33	6
34	1
35	8
36	1
37	1
38	4
39	6
40	1
41	8
42	1
43	18
44	9
45	1
46	9
47	10
48	16
49	1
50	18
51	1
52	1
53	4
54	1
55	1
56	4
57	1
58	6
59	12
60	11
61	27
62	14
63	62
64	1
65	17
66	1
67	18
68	18
69	1
70	1
71	4
72	6
73	8
74	10
75	1
76	1
77	4
78	6
79	1
80	8
81	19

[0, 1, 1, 1, 4, 1, 1, 4, 1, 1, 4, 1, 6, 12, 1, 1, 4, 6, 1, 8, 1, 1, 4, 1, 6, 22, 1, 9, 10, 1, 1, 4, 6, 1, 8, 1, 1, 4, 6, 1, 8, 1, 18, 9, 1, 9, 10, 16, 1, 18, 1, 1, 4, 1, 1, 4, 1, 6, 12, 11, 27, 14, 62, 1, 17, 1, 18, 18, 1, 1, 4, 6, 8, 10, 1, 1, 4, 6, 1, 8, 19]

cp's OEIS Frontend

A346778 Least k >= 1 such that {b(1), b(2), ..., b(k)} = {n, n-1, ..., n-k+1} and b(k+1) = n-k where b(1..n) is row n of A088643, or k = 0 if no such k >= 1 exists.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	1
5	4
6	1
7	1
8	4
9	1
10	1
11	4
12	1
13	6
14	12
15	1
16	1
17	4
18	6
19	1
20	8
21	1
22	1
23	4
24	1
25	6
26	22
27	1
28	9
29	10
30	1
31	1
32	4
33	6
34	1
35	8
36	1
37	1
38	4
39	6
40	1
41	8
42	1
43	18
44	9
45	1
46	9
47	10
48	16
49	1
50	18
51	1
52	1
53	4
54	1
55	1
56	4
57	1
58	6
59	12
60	11
61	27
62	14
63	62
64	1
65	17
66	1
67	18
68	18
69	1
70	1
71	4
72	6
73	8
74	10
75	1
76	1
77	4
78	6
79	1
80	8
81	19

n	a(n)
1	0
2	1
3	1
4	1
5	4
6	1
7	1
8	4
9	1
10	1
11	4
12	1
13	6
14	12
15	1
16	1
17	4
18	6
19	1
20	8
21	1
22	1
23	4
24	1
25	6
26	22
27	1
28	9
29	10
30	1
31	1
32	4
33	6
34	1
35	8
36	1
37	1
38	4
39	6
40	1
41	8
42	1
43	18
44	9
45	1
46	9
47	10
48	16
49	1
50	18
51	1
52	1
53	4
54	1
55	1
56	4
57	1
58	6
59	12
60	11
61	27
62	14
63	62
64	1
65	17
66	1
67	18
68	18
69	1
70	1
71	4
72	6
73	8
74	10
75	1
76	1
77	4
78	6
79	1
80	8
81	19

n	a(n)
1	0
2	1
3	1
4	1
5	4
6	1
7	1
8	4
9	1
10	1
11	4
12	1
13	6
14	12
15	1
16	1
17	4
18	6
19	1
20	8
21	1
22	1
23	4
24	1
25	6
26	22
27	1
28	9
29	10
30	1
31	1
32	4
33	6
34	1
35	8
36	1
37	1
38	4
39	6
40	1
41	8
42	1
43	18
44	9
45	1
46	9
47	10
48	16
49	1
50	18
51	1
52	1
53	4
54	1
55	1
56	4
57	1
58	6
59	12
60	11
61	27
62	14
63	62
64	1
65	17
66	1
67	18
68	18
69	1
70	1
71	4
72	6
73	8
74	10
75	1
76	1
77	4
78	6
79	1
80	8
81	19