177635domain: NAppears in sequencesPositions at which powers of 2 occur in A057929. (Or -1 if it does not occur.)at n=27A057931Irregular triangle read by rows: T(n,k) (0 <= k <= n^2) are coefficients of cluster density function for site percolation on an n X n 2D square lattice with periodic boundary conditions.at n=39A365941