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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.

A230559 Pseudoprimes n to base 2 such that n-2, n+2 and n+4 are primes.

Table of values

n a(n)
1 634038307449
2 4846359321105
3 11927878640385
4 20835183400305
5 34166605315305
6 54096163177785
7 63154533545265
8 88365393281985
9 189080281720065
10 850943773070385
11 917252751841665
12 1278728202166185
13 1602254869802049
14 3742704749436465
15 6082185264252945

List of values

[634038307449, 4846359321105, 11927878640385, 20835183400305, 34166605315305, 54096163177785, 63154533545265, 88365393281985, 189080281720065, 850943773070385, 917252751841665, 1278728202166185, 1602254869802049, 3742704749436465, 6082185264252945]

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

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