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.

A026672 a(n) = T(2n,n-1), T given by A026670. Also T(2n,n-1)=T(2n+1,n+2), T given by A026725; and T(2n,n-1), T given by A026736.

Table of values

n a(n)
2 1
3 5
4 22
5 94
6 398
7 1680
8 7085
9 29877
10 126021
11 531751
12 2244627
13 9478605
14 40040183
15 169193597
16 715143046
17 3023492646
18 12785541850
19 54076955716
20 228759017624
21 967850695362
22 4095387893312
23 17331318506030

List of values

[1, 5, 22, 94, 398, 1680, 7085, 29877, 126021, 531751, 2244627, 9478605, 40040183, 169193597, 715143046, 3023492646, 12785541850, 54076955716, 228759017624, 967850695362, 4095387893312, 17331318506030]

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

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