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.

A258396 Number of 2n-length strings of balanced parentheses of exactly 8 different types that are introduced in ascending order.

Table of values

n a(n)
8 1430
9 175032
10 12597000
11 698377680
12 33079524324
13 1411221754800
14 55928745100800
15 2100173331484800
16 75727786603836510
17 2646827388046104120
18 90290940344491887000
19 3021580012515765901200
20 99583828881536195805180
21 3242049884573075122369680

List of values

[1430, 175032, 12597000, 698377680, 33079524324, 1411221754800, 55928745100800, 2100173331484800, 75727786603836510, 2646827388046104120, 90290940344491887000, 3021580012515765901200, 99583828881536195805180, 3242049884573075122369680]

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

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