68618940391domain: NAppears in sequencesa(n) = 10^n - 9^n.at n=11A016189Nexus numbers: a(n) = (n+1)^11 - n^11.at n=9A022527a(n) = n*n^n - (n-1)*(n-1)^n.at n=10A085283Primes of the form (k+1)^11 - k^11.at n=2A189055Primes of the form 10^k-9^k.at n=3A199819