53450domain: NAppears in sequencesa(n) is the number of odd numbers k in range [2^n, (2^(n+1))-1] such that all terms in finite sequence [k, floor(k/2), floor(k/4), floor(k/8), ..., 1] are squarefree.at n=37A293441Number of n-digit left- or right-truncatable primes with no consecutive zero digits.at n=9A346662