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.

A059278 G.f. is G(x*(1-x)/(1-2*x)) where G(x) is g.f. for Catalan numbers A000108.

Table of values

n a(n)
0 1
1 1
2 3
3 11
4 43
5 175
6 735
7 3167
8 13935
9 62383
10 283311
11 1302271
12 6047679
13 28332991
14 133752191
15 635618431
16 3038326911
17 14599154431
18 70474889471
19 341624867071
20 1662254107391
21 8115717976831
22 39747223425791
23 195219110182911
24 961330824858623

List of values

[1, 1, 3, 11, 43, 175, 735, 3167, 13935, 62383, 283311, 1302271, 6047679, 28332991, 133752191, 635618431, 3038326911, 14599154431, 70474889471, 341624867071, 1662254107391, 8115717976831, 39747223425791, 195219110182911, 961330824858623]