67108800domain: NAppears in sequencesTheta series of D_10 lattice.at n=24A008432Number of primitive (aperiodic) palindromes using a maximum of four different symbols.at n=24A056460Number of primitive (period n) periodic palindromes using a maximum of four different symbols.at n=24A056495a(n) = 64*(2^n - 1).at n=20A175166