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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.

A210277 a(n) = (3*n)!/3^n.

Table of values

n a(n)
0 1
1 2
2 80
3 13440
4 5913600
5 5381376000
6 8782405632000
7 23361198981120000
8 94566133475573760000
9 553211880832106496000000
10 4492080472356704747520000000
11 49017582114356362204938240000000
12 699971072593008852286518067200000000

List of values

[1, 2, 80, 13440, 5913600, 5381376000, 8782405632000, 23361198981120000, 94566133475573760000, 553211880832106496000000, 4492080472356704747520000000, 49017582114356362204938240000000, 699971072593008852286518067200000000]

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

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