634880domain: NAppears in sequencesNumber of cyclic subgroups of order 7 of general affine group AGL(n,2).at n=4A063410Expansion of ((1-x)*(3*x^2-3*x+1))/(1-2*x)^3.at n=15A190050Triangular array read by rows, T(n,k) is the number of n X n matrices over GF(2) that converge to an idempotent at rank k, n>=0, 0<=k<=n.at n=17A379778