A138061 - cp's OEIS frontend

A138061 This sequence is a triangular sequence formed by the substitution: ( French sideways graph) 1->1,2;2->3;3->4;4->1; as a Markov style substitution form. The result is the differential polynomial coefficient form. ( first zero omitted).

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

[2, 2, 6, 2, 6, 12, 2, 6, 12, 4, 2, 6, 12, 4, 5, 12, 2, 6, 12, 4, 5, 12, 7, 16, 27, 2, 6, 12, 4, 5, 12, 7, 16, 27, 10, 22, 36, 52, 2, 6, 12, 4, 5, 12, 7, 16, 27, 10, 22, 36, 52, 14, 30, 48, 68, 18, 2, 6, 12, 4, 5, 12, 7, 16, 27, 10, 22, 36, 52, 14, 30, 48, 68, 18, 19, 40, 63, 88, 23, 24]

cp's OEIS Frontend

A138061 This sequence is a triangular sequence formed by the substitution: ( French sideways graph) 1->1,2;2->3;3->4;4->1; as a Markov style substitution form. The result is the differential polynomial coefficient form. ( first zero omitted).

Table of values

List of values

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

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

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