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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.

A027637 a(n) = Product_{i=1..n} (4^i - 1).

Table of values

n a(n)
0 1
1 3
2 45
3 2835
4 722925
5 739552275
6 3028466566125
7 49615367752825875
8 3251543125681443718125
9 852369269595510700600441875
10 893773106866112632882108339078125
11 3748755223447856814435325652920396921875

List of values

[1, 3, 45, 2835, 722925, 739552275, 3028466566125, 49615367752825875, 3251543125681443718125, 852369269595510700600441875, 893773106866112632882108339078125, 3748755223447856814435325652920396921875]

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

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