A259857 - cp's OEIS frontend

A259857 Triangle T(n,k), n>=1, 2<=k<=n+1, read by rows, where T(n,k) is the number of self-avoiding square-lattice polygons by area n and perimeter 2*k.

n	a(n)
1	1
2	0
3	2
4	0
5	0
6	6
7	0
8	0
9	1
10	18
11	0
12	0
13	0
14	8
15	55
16	0
17	0
18	0
19	2
20	40
21	174
22	0
23	0
24	0
25	0
26	22
27	168
28	566
29	0
30	0
31	0
32	0
33	6
34	134
35	676
36	1868
37	0
38	0
39	0
40	0
41	1
42	72
43	656
44	2672
45	6237
46	0
47	0
48	0
49	0
50	0
51	30
52	482
53	2992
54	10376
55	21050
56	0
57	0
58	0
59	0
60	0
61	8
62	310
63	2592
64	13160
65	39824
66	71666
67	0
68	0
69	0
70	0
71	0
72	2
73	151
74	2086
75	12862
76	56162
77	151878
78	245696

[1, 0, 2, 0, 0, 6, 0, 0, 1, 18, 0, 0, 0, 8, 55, 0, 0, 0, 2, 40, 174, 0, 0, 0, 0, 22, 168, 566, 0, 0, 0, 0, 6, 134, 676, 1868, 0, 0, 0, 0, 1, 72, 656, 2672, 6237, 0, 0, 0, 0, 0, 30, 482, 2992, 10376, 21050, 0, 0, 0, 0, 0, 8, 310, 2592, 13160, 39824, 71666, 0, 0, 0, 0, 0, 2, 151, 2086, 12862, 56162, 151878, 245696]

cp's OEIS Frontend

A259857 Triangle T(n,k), n>=1, 2<=k<=n+1, read by rows, where T(n,k) is the number of self-avoiding square-lattice polygons by area n and perimeter 2*k.

Table of values

List of values