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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.

A020521 13th cyclotomic polynomial evaluated at powers of 2.

Table of values

n a(n)
0 13
1 8191
2 22369621
3 78536544841
4 300239975158033
5 1190112520884487201
6 4797324681010433232961
7 19495118728903626376364161
8 79538861190790864407636279553
9 325153619321163373997995856232961
10 1330527338889299954891005307651097601

List of values

[13, 8191, 22369621, 78536544841, 300239975158033, 1190112520884487201, 4797324681010433232961, 19495118728903626376364161, 79538861190790864407636279553, 325153619321163373997995856232961, 1330527338889299954891005307651097601]

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

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