A008855 - cp's OEIS frontend

A008855 Triangle T(n,k), n>=1, read by rows, where T(n,k) is the number of lattice polygons with area n and perimeter 2*k.

n	a(n)
1	1
2	2
3	6
4	1
5	18
6	8
7	55
8	2
9	40
10	174
11	22
12	168
13	566
14	6
15	134
16	676
17	1868
18	1
19	72
20	656
21	2672
22	6237
23	30
24	482
25	2992
26	10376
27	21050
28	8
29	310
30	2592
31	13160
32	39824
33	71666
34	2
35	151
36	2086
37	12862
38	56162
39	151878
40	245696
41	68
42	1392
43	11717
44	61032
45	234520
46	576656
47	847317
48	22
49	864
50	9332
51	60864
52	279492
53	965136
54	2181496
55	2937116

[1, 2, 6, 1, 18, 8, 55, 2, 40, 174, 22, 168, 566, 6, 134, 676, 1868, 1, 72, 656, 2672, 6237, 30, 482, 2992, 10376, 21050, 8, 310, 2592, 13160, 39824, 71666, 2, 151, 2086, 12862, 56162, 151878, 245696, 68, 1392, 11717, 61032, 234520, 576656, 847317, 22, 864, 9332, 60864, 279492, 965136, 2181496, 2937116]

cp's OEIS Frontend

A008855 Triangle T(n,k), n>=1, read by rows, where T(n,k) is the number of lattice polygons with area n and perimeter 2*k.

Table of values

List of values