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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.

A291998 Primes of the form Phi(k, -5), where Phi is the cyclotomic polynomial.

Table of values

n a(n)
1 521
2 31
3 601
4 19531
5 12207031
6 390001
7 305175781
8 234750601
9 60081451169922001
10 152587500001
11 10910444855403996246103496881
12 59509429687890001
13 11293772630057337854244300009061892827351888021
14 9080418348371887359375390001
15 5465713352000770660547109750601

List of values

[521, 31, 601, 19531, 12207031, 390001, 305175781, 234750601, 60081451169922001, 152587500001, 10910444855403996246103496881, 59509429687890001, 11293772630057337854244300009061892827351888021, 9080418348371887359375390001, 5465713352000770660547109750601]

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

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