A260333 - cp's OEIS frontend

A260333 Irregular triangle read by rows: T(n,k) = number of ways k brooks (0 <= k <= 2n+1) can be placed on the grid points of an n triboard so that no two brooks lie in the same straight line.

n	a(n)
0	1
1	1
2	1
3	7
4	6
5	2
6	1
7	19
8	87
9	115
10	30
11	6
12	1
13	37
14	417
15	1783
16	2902
17	1629
18	196
19	28
20	1
21	61
22	1278
23	11758
24	50465
25	99717
26	84366
27	26836
28	2196
29	244
30	1
31	91
32	3060
33	49304
34	413473
35	1841079
36	4277156
37	4929400
38	2572104
39	523432
40	27984
41	2544
42	1
43	127
44	6261
45	156633
46	2184561

[1, 1, 1, 7, 6, 2, 1, 19, 87, 115, 30, 6, 1, 37, 417, 1783, 2902, 1629, 196, 28, 1, 61, 1278, 11758, 50465, 99717, 84366, 26836, 2196, 244, 1, 91, 3060, 49304, 413473, 1841079, 4277156, 4929400, 2572104, 523432, 27984, 2544, 1, 127, 6261, 156633, 2184561]

cp's OEIS Frontend

A260333 Irregular triangle read by rows: T(n,k) = number of ways k brooks (0 <= k <= 2n+1) can be placed on the grid points of an n triboard so that no two brooks lie in the same straight line.

Table of values

List of values