{"schema":"vela.problem-packet.v0.1","problem":334,"statement":"Find the best function $f(n)$ such that every $n$ can be written as $n=a+b$ where both $a,b$ are $f(n)$-smooth (that is, are not divisible by any prime $p&#62;f(n)$.)","status":"open","seam":"raw","closureRoutes":[],"obligations":[],"attestations":[],"attempts":[],"velaLean":[],"oeis":[{"id":"A045535","name":"Least negative pseudosquare modulo the first n odd primes.","terms":"7,23,71,311,479,1559,5711,10559,18191,31391,118271,366791,366791,2155919,2155919,2155919,6077111,6077111,98538359,120293","url":"https://oeis.org/A045535"},{"id":"A062241","name":"Smallest integer >= 2 that is not the sum of 2 positive integers whose prime factors are all <= prime(n), the n-th prime.","terms":"3,7,23,71,311,479,1559,5711,10559,18191,31391,118271,366791,366791,2155919,2155919,2155919,6077111,6077111,98538359,1202","url":"https://oeis.org/A062241"}],"generated_note":"derived view; the signed event log is the source of truth (vela check / vela reproduce)"}