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.

A227504 Schroeder triangle sums: a(n) = A006603(n+1) - A006318(n+1).

Table of values

n a(n)
1 1
2 4
3 17
4 74
5 335
6 1566
7 7515
8 36836
9 183709
10 929392
11 4758477
12 24611950
13 128411643
14 675051770
15 3572165431
16 19012868648
17 101718917721
18 546707554844
19 2950563205705
20 15983712882930
21 86880753686279
22 473710078493718
23 2590187432233363
24 14199709022579788

List of values

[1, 4, 17, 74, 335, 1566, 7515, 36836, 183709, 929392, 4758477, 24611950, 128411643, 675051770, 3572165431, 19012868648, 101718917721, 546707554844, 2950563205705, 15983712882930, 86880753686279, 473710078493718, 2590187432233363, 14199709022579788]

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

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