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.

A351150 G.f. A(x) satisfies: A(x) = 1 + x^2 * A(x/(1 - 4*x)) / (1 - 4*x).

Table of values

n a(n)
0 1
1 0
2 1
3 4
4 17
5 80
6 433
7 2724
8 19489
9 153536
10 1301601
11 11754084
12 112802097
13 1150079056
14 12437130001
15 142144768324
16 1709041379393
17 21522252928000
18 282920962675905
19 3873124754702660
20 55125031662585425
21 814541756986322128
22 12477752083406752881
23 197861190429889969252

List of values

[1, 0, 1, 4, 17, 80, 433, 2724, 19489, 153536, 1301601, 11754084, 112802097, 1150079056, 12437130001, 142144768324, 1709041379393, 21522252928000, 282920962675905, 3873124754702660, 55125031662585425, 814541756986322128, 12477752083406752881, 197861190429889969252]

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

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