A272053 - cp's OEIS frontend

A272053 a(n) is the number of equivalence classes of simple, open polygonal chains consisting of two segments and with all three vertices on the lattice points of an n X n grid.

n	a(n)
0	0
1	2
2	19
3	76
4	215
5	481
6	946
7	1691
8	2789
9	4356
10	6525
11	9397
12	13128
13	17874
14	23768
15	31071
16	39953
17	50551
18	63141
19	77947
20	95234
21	115223
22	138305
23	164501
24	194344
25	228218
26	266165
27	308688
28	356104
29	408731
30	467166
31	531616
32	602362
33	679952
34	764821
35	857517

[0, 2, 19, 76, 215, 481, 946, 1691, 2789, 4356, 6525, 9397, 13128, 17874, 23768, 31071, 39953, 50551, 63141, 77947, 95234, 115223, 138305, 164501, 194344, 228218, 266165, 308688, 356104, 408731, 467166, 531616, 602362, 679952, 764821, 857517]

cp's OEIS Frontend

A272053 a(n) is the number of equivalence classes of simple, open polygonal chains consisting of two segments and with all three vertices on the lattice points of an n X n grid.

Table of values

List of values