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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.

A225328 a(n) = A002426(n)^n, where A002426 is the central trinomial coefficients.

Table of values

n a(n)
0 1
1 1
2 9
3 343
4 130321
5 345025251
6 7858047974841
7 1447930954097073657
8 2255178731296086753063201
9 29588424532574699588724679418659
10 3308916781795356089160906125431831800049
11 3166064605712293355286523525163381509588445189997

List of values

[1, 1, 9, 343, 130321, 345025251, 7858047974841, 1447930954097073657, 2255178731296086753063201, 29588424532574699588724679418659, 3308916781795356089160906125431831800049, 3166064605712293355286523525163381509588445189997]

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

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