229691domain: NAppears in sequencesa(n) = 11*a(n-1) + 12*a(n-2).at n=6A015609a(n) = n^5 - n^4 + n^3 - n^2 + n - 1.at n=12A062159Numbers whose set of base 12 digits is {0,B}, where B base 12 = 11 base 10.at n=21A097258