A180062 - cp's OEIS frontend

A180062 Irregular triangle by rows derived from variants of Cartan matrices: 1's in the super and subdiagonals and 3,4,4,4,... in the main diagonal alternating with 4,4,4,...

n	a(n)
1	1
2	1
3	1
4	3
5	1
6	4
7	1
8	7
9	11
10	1
11	8
12	15
13	1
14	11
15	38
16	41
17	1
18	12
19	46
20	56
21	1
22	15
23	81
24	186
25	153
26	1
27	16
28	93
29	232
30	209
31	1
32	19
33	140
34	49
35	859
36	571
37	1
38	20
39	156
40	592
41	1091
42	780
43	1
44	23
45	215
46	1044
47	2774
48	3821
49	2131
50	1
51	24
52	235
53	1200
54	3366
55	4912
56	2911
57	1
58	27
59	306
60	1885
61	6810
62	14418

[1, 1, 1, 3, 1, 4, 1, 7, 11, 1, 8, 15, 1, 11, 38, 41, 1, 12, 46, 56, 1, 15, 81, 186, 153, 1, 16, 93, 232, 209, 1, 19, 140, 49, 859, 571, 1, 20, 156, 592, 1091, 780, 1, 23, 215, 1044, 2774, 3821, 2131, 1, 24, 235, 1200, 3366, 4912, 2911, 1, 27, 306, 1885, 6810, 14418]

cp's OEIS Frontend

A180062 Irregular triangle by rows derived from variants of Cartan matrices: 1's in the super and subdiagonals and 3,4,4,4,... in the main diagonal alternating with 4,4,4,...

Table of values

List of values