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.

A188648 Binomial sums a(n) = Sum_{k=0..n} (binomial(2n-k,k))^2.

Table of values

n a(n)
0 1
1 2
2 11
3 63
4 376
5 2317
6 14545
7 92512
8 594169
9 3844787
10 25027296
11 163701327
12 1075049011
13 7083830648
14 46812088751
15 310118453573
16 2058919125662
17 13695571200353
18 91254952276859
19 608960974528058
20 4069232436916151

List of values

[1, 2, 11, 63, 376, 2317, 14545, 92512, 594169, 3844787, 25027296, 163701327, 1075049011, 7083830648, 46812088751, 310118453573, 2058919125662, 13695571200353, 91254952276859, 608960974528058, 4069232436916151]

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

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