36802domain: NAppears in sequencesa(0) = 1, a(n) = 23*n^2 + 2 for n>0.at n=40A010013Number of polygons of length 2n with one hole on square lattice (not allowing rotations).at n=4A056634a(n) is the least number k not ending in 0 such that k^n has at least n 0's in its decimal expansion.at n=34A368397