A171176 - cp's OEIS frontend

A171176 Triangle read by rows in which row n lists 3n-1 together with the first 2n-1 positive integers, in reverse order.

n	a(n)
1	2
2	1
3	5
4	3
5	2
6	1
7	8
8	5
9	4
10	3
11	2
12	1
13	11
14	7
15	6
16	5
17	4
18	3
19	2
20	1
21	14
22	9
23	8
24	7
25	6
26	5
27	4
28	3
29	2
30	1
31	17
32	11
33	10
34	9
35	8
36	7
37	6
38	5
39	4
40	3
41	2
42	1
43	20
44	13
45	12
46	11
47	10
48	9
49	8
50	7
51	6
52	5
53	4
54	3
55	2
56	1
57	23
58	15
59	14
60	13
61	12
62	11
63	10
64	9
65	8
66	7
67	6
68	5
69	4
70	3
71	2
72	1
73	26
74	17
75	16
76	15
77	14
78	13
79	12
80	11
81	10
82	9
83	8
84	7
85	6
86	5
87	4
88	3
89	2
90	1

[2, 1, 5, 3, 2, 1, 8, 5, 4, 3, 2, 1, 11, 7, 6, 5, 4, 3, 2, 1, 14, 9, 8, 7, 6, 5, 4, 3, 2, 1, 17, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 20, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 23, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 26, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1]

cp's OEIS Frontend

A171176 Triangle read by rows in which row n lists 3n-1 together with the first 2n-1 positive integers, in reverse order.

Table of values

List of values

n	a(n)
1	2
2	1
3	5
4	3
5	2
6	1
7	8
8	5
9	4
10	3
11	2
12	1
13	11
14	7
15	6
16	5
17	4
18	3
19	2
20	1
21	14
22	9
23	8
24	7
25	6
26	5
27	4
28	3
29	2
30	1
31	17
32	11
33	10
34	9
35	8
36	7
37	6
38	5
39	4
40	3
41	2
42	1
43	20
44	13
45	12
46	11
47	10
48	9
49	8
50	7
51	6
52	5
53	4
54	3
55	2
56	1
57	23
58	15
59	14
60	13
61	12
62	11
63	10
64	9
65	8
66	7
67	6
68	5
69	4
70	3
71	2
72	1
73	26
74	17
75	16
76	15
77	14
78	13
79	12
80	11
81	10
82	9
83	8
84	7
85	6
86	5
87	4
88	3
89	2
90	1

n	a(n)
1	2
2	1
3	5
4	3
5	2
6	1
7	8
8	5
9	4
10	3
11	2
12	1
13	11
14	7
15	6
16	5
17	4
18	3
19	2
20	1
21	14
22	9
23	8
24	7
25	6
26	5
27	4
28	3
29	2
30	1
31	17
32	11
33	10
34	9
35	8
36	7
37	6
38	5
39	4
40	3
41	2
42	1
43	20
44	13
45	12
46	11
47	10
48	9
49	8
50	7
51	6
52	5
53	4
54	3
55	2
56	1
57	23
58	15
59	14
60	13
61	12
62	11
63	10
64	9
65	8
66	7
67	6
68	5
69	4
70	3
71	2
72	1
73	26
74	17
75	16
76	15
77	14
78	13
79	12
80	11
81	10
82	9
83	8
84	7
85	6
86	5
87	4
88	3
89	2
90	1

n	a(n)
1	2
2	1
3	5
4	3
5	2
6	1
7	8
8	5
9	4
10	3
11	2
12	1
13	11
14	7
15	6
16	5
17	4
18	3
19	2
20	1
21	14
22	9
23	8
24	7
25	6
26	5
27	4
28	3
29	2
30	1
31	17
32	11
33	10
34	9
35	8
36	7
37	6
38	5
39	4
40	3
41	2
42	1
43	20
44	13
45	12
46	11
47	10
48	9
49	8
50	7
51	6
52	5
53	4
54	3
55	2
56	1
57	23
58	15
59	14
60	13
61	12
62	11
63	10
64	9
65	8
66	7
67	6
68	5
69	4
70	3
71	2
72	1
73	26
74	17
75	16
76	15
77	14
78	13
79	12
80	11
81	10
82	9
83	8
84	7
85	6
86	5
87	4
88	3
89	2
90	1