576840domain: NAppears in sequencesNumber of positive integer solutions to the Diophantine equation x + y + 2z = n^2.at n=38A218832The smallest number k that has a factorization k = f1*f2*...*fr where the numbers k, f1, f2, ..., fr together contain every number from 0 to n, without overlap, as substrings.at n=11A371958