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.

A222051 Central terms in rows of triangle A220178.

Table of values

n a(n)
0 1
1 6
2 150
3 4200
4 131670
5 4360356
6 149885736
7 5287716720
8 190170736470
9 6941694002100
10 256393942704900
11 9561265547652000
12 359399657792284200
13 13600394660797333200
14 517621830467456905200
15 19798076590576557847200
16 760517744810283004728150
17 29325625363665142395552900

List of values

[1, 6, 150, 4200, 131670, 4360356, 149885736, 5287716720, 190170736470, 6941694002100, 256393942704900, 9561265547652000, 359399657792284200, 13600394660797333200, 517621830467456905200, 19798076590576557847200, 760517744810283004728150, 29325625363665142395552900]

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

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