A340584 - cp's OEIS frontend

A340584 Irregular triangle read by rows T(n,k) in which row n lists sigma(n) + sigma(n-1) together with the first n - 2 terms of A000203 in reverse order, with T(1,1) = 1, n >= 1.

n	a(n)
1	1
2	4
3	7
4	1
5	11
6	3
7	1
8	13
9	4
10	3
11	1
12	18
13	7
14	4
15	3
16	1
17	20
18	6
19	7
20	4
21	3
22	1
23	23
24	12
25	6
26	7
27	4
28	3
29	1
30	28
31	8
32	12
33	6
34	7
35	4
36	3
37	1
38	31
39	15
40	8
41	12
42	6
43	7
44	4
45	3
46	1
47	30
48	13
49	15
50	8
51	12
52	6
53	7
54	4
55	3
56	1
57	40
58	18
59	13
60	15
61	8
62	12
63	6
64	7
65	4
66	3
67	1
68	42
69	12
70	18
71	13
72	15
73	8
74	12
75	6
76	7
77	4
78	3
79	1
80	38
81	28
82	12
83	18
84	13
85	15
86	8
87	12
88	6
89	7
90	4
91	3
92	1

[1, 4, 7, 1, 11, 3, 1, 13, 4, 3, 1, 18, 7, 4, 3, 1, 20, 6, 7, 4, 3, 1, 23, 12, 6, 7, 4, 3, 1, 28, 8, 12, 6, 7, 4, 3, 1, 31, 15, 8, 12, 6, 7, 4, 3, 1, 30, 13, 15, 8, 12, 6, 7, 4, 3, 1, 40, 18, 13, 15, 8, 12, 6, 7, 4, 3, 1, 42, 12, 18, 13, 15, 8, 12, 6, 7, 4, 3, 1, 38, 28, 12, 18, 13, 15, 8, 12, 6, 7, 4, 3, 1]

cp's OEIS Frontend

A340584 Irregular triangle read by rows T(n,k) in which row n lists sigma(n) + sigma(n-1) together with the first n - 2 terms of A000203 in reverse order, with T(1,1) = 1, n >= 1.

Table of values

List of values

n	a(n)
1	1
2	4
3	7
4	1
5	11
6	3
7	1
8	13
9	4
10	3
11	1
12	18
13	7
14	4
15	3
16	1
17	20
18	6
19	7
20	4
21	3
22	1
23	23
24	12
25	6
26	7
27	4
28	3
29	1
30	28
31	8
32	12
33	6
34	7
35	4
36	3
37	1
38	31
39	15
40	8
41	12
42	6
43	7
44	4
45	3
46	1
47	30
48	13
49	15
50	8
51	12
52	6
53	7
54	4
55	3
56	1
57	40
58	18
59	13
60	15
61	8
62	12
63	6
64	7
65	4
66	3
67	1
68	42
69	12
70	18
71	13
72	15
73	8
74	12
75	6
76	7
77	4
78	3
79	1
80	38
81	28
82	12
83	18
84	13
85	15
86	8
87	12
88	6
89	7
90	4
91	3
92	1

n	a(n)
1	1
2	4
3	7
4	1
5	11
6	3
7	1
8	13
9	4
10	3
11	1
12	18
13	7
14	4
15	3
16	1
17	20
18	6
19	7
20	4
21	3
22	1
23	23
24	12
25	6
26	7
27	4
28	3
29	1
30	28
31	8
32	12
33	6
34	7
35	4
36	3
37	1
38	31
39	15
40	8
41	12
42	6
43	7
44	4
45	3
46	1
47	30
48	13
49	15
50	8
51	12
52	6
53	7
54	4
55	3
56	1
57	40
58	18
59	13
60	15
61	8
62	12
63	6
64	7
65	4
66	3
67	1
68	42
69	12
70	18
71	13
72	15
73	8
74	12
75	6
76	7
77	4
78	3
79	1
80	38
81	28
82	12
83	18
84	13
85	15
86	8
87	12
88	6
89	7
90	4
91	3
92	1

n	a(n)
1	1
2	4
3	7
4	1
5	11
6	3
7	1
8	13
9	4
10	3
11	1
12	18
13	7
14	4
15	3
16	1
17	20
18	6
19	7
20	4
21	3
22	1
23	23
24	12
25	6
26	7
27	4
28	3
29	1
30	28
31	8
32	12
33	6
34	7
35	4
36	3
37	1
38	31
39	15
40	8
41	12
42	6
43	7
44	4
45	3
46	1
47	30
48	13
49	15
50	8
51	12
52	6
53	7
54	4
55	3
56	1
57	40
58	18
59	13
60	15
61	8
62	12
63	6
64	7
65	4
66	3
67	1
68	42
69	12
70	18
71	13
72	15
73	8
74	12
75	6
76	7
77	4
78	3
79	1
80	38
81	28
82	12
83	18
84	13
85	15
86	8
87	12
88	6
89	7
90	4
91	3
92	1