A334691 - cp's OEIS frontend

A334691 Irregular triangle read by rows: T(n,k) (n >= 1, 2 <= k <= 2*n) = number of interior vertices in the n-th figure shown in A255011 (meaning the figure with 4n points on the perimeter) where k lines meet.

n	a(n)
1	1
2	20
3	8
4	1
5	204
6	32
7	8
8	0
9	1
10	616
11	152
12	20
13	8
14	4
15	0
16	1
17	2428
18	252
19	36
20	16
21	4
22	0
23	0
24	0
25	1
26	3968
27	572
28	156
29	72
30	16
31	8
32	4
33	0
34	4
35	0
36	1
37	11164
38	900
39	120
40	52
41	16
42	8
43	4
44	0
45	0
46	0
47	0
48	0
49	1
50	16884
51	1712
52	396
53	132
54	40
55	20
56	8
57	8
58	8
59	0
60	0
61	0
62	0
63	0
64	1
65	30116
66	2536
67	600
68	140
69	60
70	24
71	8
72	20
73	8
74	0
75	0
76	0
77	0
78	0
79	0
80	0
81	1

[1, 20, 8, 1, 204, 32, 8, 0, 1, 616, 152, 20, 8, 4, 0, 1, 2428, 252, 36, 16, 4, 0, 0, 0, 1, 3968, 572, 156, 72, 16, 8, 4, 0, 4, 0, 1, 11164, 900, 120, 52, 16, 8, 4, 0, 0, 0, 0, 0, 1, 16884, 1712, 396, 132, 40, 20, 8, 8, 8, 0, 0, 0, 0, 0, 1, 30116, 2536, 600, 140, 60, 24, 8, 20, 8, 0, 0, 0, 0, 0, 0, 0, 1]

cp's OEIS Frontend

A334691 Irregular triangle read by rows: T(n,k) (n >= 1, 2 <= k <= 2*n) = number of interior vertices in the n-th figure shown in A255011 (meaning the figure with 4n points on the perimeter) where k lines meet.

Table of values

List of values