172224domain: NAppears in sequencesNumbers k that have no zero digits and such that both k+1 and (product of digits of k) + 1 are squares.at n=28A081990Total Wiener index of star-like trees with n edges.at n=17A186310Number of 2 X 2 matrices with entries in {0,1,...,n} and even trace with no entries repeated.at n=25A280056