cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A292104 Number of interior points that are the intersections of exactly two chords in the configuration A006561(n).

Table of values

n a(n)
1 0
2 0
3 0
4 1
5 5
6 12
7 35
8 40
9 126
10 140
11 330
12 228
13 715
14 644
15 1365
16 1168
17 2380
18 1512
19 3876
20 3360
21 5985
22 5280
23 8855
24 6144
25 12650
26 11284
27 17550
28 15680
29 23751
30 13800
31 31465
32 28448
33 40920
34 37264
35 52360
36 42444
37 66045
38 60648
39 82251
40 75720
41 101270
42 75012
43 123410
44 114400
45 148995
46 138644
47 178365
48 152064

List of values

[0, 0, 0, 1, 5, 12, 35, 40, 126, 140, 330, 228, 715, 644, 1365, 1168, 2380, 1512, 3876, 3360, 5985, 5280, 8855, 6144, 12650, 11284, 17550, 15680, 23751, 13800, 31465, 28448, 40920, 37264, 52360, 42444, 66045, 60648, 82251, 75720, 101270, 75012, 123410, 114400, 148995, 138644, 178365, 152064]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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