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.

A185148 Number of rectangular arrangements of [1,3n] in 3 increasing sequences of size n and n monotonic sequences of size 3.

Table of values

n a(n)
1 1
2 6
3 53
4 587
5 7572
6 109027
7 1705249
8 28440320
9 499208817
10 9134237407
11 172976239886
12 3371587949969
13 67351686970929
14 1374179898145980
15 28557595591148315
16 603118526483125869
17 12920388129877471030
18 280324904918707937001
19 6151595155000424589327
20 136384555249451824930126

List of values

[1, 6, 53, 587, 7572, 109027, 1705249, 28440320, 499208817, 9134237407, 172976239886, 3371587949969, 67351686970929, 1374179898145980, 28557595591148315, 603118526483125869, 12920388129877471030, 280324904918707937001, 6151595155000424589327, 136384555249451824930126]

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

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