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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.

A178186 Sum 3^((k^2+3k)/2) from k=1 to n.

Table of values

n a(n)
1 9
2 252
3 19935
4 4802904
5 3491587305
6 7629089072292
7 50039174188071999
8 984820941357799304880
9 58150721823981417489695049
10 10301109611599361435391036962892
11 5474411390529830981438591324606714655

List of values

[9, 252, 19935, 4802904, 3491587305, 7629089072292, 50039174188071999, 984820941357799304880, 58150721823981417489695049, 10301109611599361435391036962892, 5474411390529830981438591324606714655]

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

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