88581312domain: NAppears in sequencesNumbers m such that the concatenation of m with m+4 gives a square.at n=11A115437Numbers k such that k concatenated with k-5 gives the product of two numbers which differ by 6.at n=17A116125Numbers k such that k concatenated with k+3 gives the product of two numbers which differ by 2.at n=10A116177