A334701 - cp's OEIS frontend

A334701 Consider the figure made up of a row of n adjacent congruent rectangles, with diagonals of all possible rectangles drawn; a(n) = number of interior vertices where exactly two lines cross.

n	a(n)
1	1
2	6
3	24
4	54
5	124
6	214
7	382
8	598
9	950
10	1334
11	1912
12	2622
13	3624
14	4690
15	6096
16	7686
17	9764
18	12010
19	14866
20	18026
21	21904
22	25918
23	30818
24	36246
25	42654
26	49246
27	57006
28	65334
29	75098
30	85414
31	97384
32	110138
33	124726
34	139642
35	156286
36	174018
37	194106
38	214570
39	237534
40	261666
41	288686
42	316770
43	348048
44	380798
45	416524
46	452794
47	492830

[1, 6, 24, 54, 124, 214, 382, 598, 950, 1334, 1912, 2622, 3624, 4690, 6096, 7686, 9764, 12010, 14866, 18026, 21904, 25918, 30818, 36246, 42654, 49246, 57006, 65334, 75098, 85414, 97384, 110138, 124726, 139642, 156286, 174018, 194106, 214570, 237534, 261666, 288686, 316770, 348048, 380798, 416524, 452794, 492830]

cp's OEIS Frontend

A334701 Consider the figure made up of a row of n adjacent congruent rectangles, with diagonals of all possible rectangles drawn; a(n) = number of interior vertices where exactly two lines cross.

Table of values

List of values