2423520

Appears in sequences

• Least k such that Sum_{i=1..k} gcd(k,i) = n * sigma(k).at n=20A072108
• Number of stabilizer states on n qubits.at n=4A353196
• Number of increasing paths from the bottom to the top of the n-hypercube (as a graded poset) which first encounter a vector of isolated zeros at stage k, weighted by k.at n=7A365554