Formal target: Corpus.OEIS7918.conjecture1
According to the "k-tuple" conjecture, $a(n)$ is the initial term of the lexicographically earliest increasing arithmetic progression of $n$ primes; the corresponding common differences are given by A061558.
Exact formal statement
∀ (n : Nat),
LT.lt.{0} 0 n →
Eq.{1} (Corpus.OEIS7918.a n)
(InfSet.sInf.{0} (Set.ofPred.{0} fun p0 => Exists.{1} fun d => Corpus.OEIS7918.isApOfNPrimes n p0 d))This target is a formal statement, not a proof of the problem.
Environment availability: available.