#116

Prime Sandwich

Difficulty: | Medium |

Topics: | math |

A balanced prime is a prime number which is also the mean of the primes directly before and after it in the sequence of valid primes. Create a function which takes an integer n, and returns true iff it is a balanced prime.

(= false (__ 4)) | |

(= true (__ 563)) | |

(= 1103 (nth (filter __ (range)) 15)) |

Code which fills in the blank: