335265domain: NAppears in sequencesExpansion of e.g.f. exp(x^2/(2*(1 - x)^2)).at n=8A335344Triangular array read by rows. T(n,k) is the number of invertible n X n matrices over GF(2) that decompose into the direct sum of k cyclic matrices, 0<=k<=n, n>=0.at n=26A346081