A331763 - cp's OEIS frontend

A331763 Number of vertices formed by drawing the lines connecting any two of the 2*(n+2) perimeter points of a 3 X (n+1) rectangular grid of points (or equally, a 2 X n grid of squares).

n	a(n)
1	13
2	37
3	99
4	213
5	401
6	657
7	1085
8	1619
9	2327
10	3257
11	4457
12	5883
13	7751
14	9885
15	12403
16	15513
17	19131
18	23181
19	28115
20	33601
21	39745
22	46821
23	54865
24	63733
25	73879
26	84889
27	97063
28	110639
29	125649
30	141797
31	160129
32	179981
33	201175
34	224481
35	249403
36	276291
37	306003
38	337425

[13, 37, 99, 213, 401, 657, 1085, 1619, 2327, 3257, 4457, 5883, 7751, 9885, 12403, 15513, 19131, 23181, 28115, 33601, 39745, 46821, 54865, 63733, 73879, 84889, 97063, 110639, 125649, 141797, 160129, 179981, 201175, 224481, 249403, 276291, 306003, 337425]

cp's OEIS Frontend

A331763 Number of vertices formed by drawing the lines connecting any two of the 2*(n+2) perimeter points of a 3 X (n+1) rectangular grid of points (or equally, a 2 X n grid of squares).

Table of values

List of values