248688domain: NAppears in sequencesNumbers whose set of base 12 digits is {0,B}, where B base 12 = 11 base 10.at n=28A097258Triangle read by rows: T(n,k) is the number of ways of building a building of height k using n 2 X 4 LEGO blocks, counted up to symmetry (for 2 <= k <= n).at n=6A112390a(n) = n^5 - n^2.at n=12A135497