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.

A003008 Number of n-level ladder expressions with A030798.

Table of values

n a(n)
1 1
2 1
3 2
4 4
5 8
6 17
7 39
8 90
9 213

List of values

[1, 1, 2, 4, 8, 17, 39, 90, 213]