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.

A160456 Number of triangles that can be built from rods with lengths 1,2,...,n by using and concatenating not necessarily all rods.

Table of values

n a(n)
3 0
4 3
5 20
6 70
7 172
8 366
9 709
10 1274
11 2166
12 3537
13 5573
14 8494
15 12588
16 18227
17 25846
18 35942
19 49124
20 66138
21 87827
22 115132
23 149166
24 191238
25 242800
26 305447
27 381012
28 471602
29 579518
30 707254
31 857627
32 1033812
33 1239238
34 1477589
35 1752963

List of values

[0, 3, 20, 70, 172, 366, 709, 1274, 2166, 3537, 5573, 8494, 12588, 18227, 25846, 35942, 49124, 66138, 87827, 115132, 149166, 191238, 242800, 305447, 381012, 471602, 579518, 707254, 857627, 1033812, 1239238, 1477589, 1752963]

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

Content is available under The OEIS End-User License Agreement.