61884domain: NAppears in sequencesCoordination sequence for 6-dimensional cyclotomic lattice Z[zeta_9].at n=12A126899Number of binary strings of length n with no substrings equal to 0000 0011 or 1100.at n=16A164430G.f. satisfies A(x) = exp( Sum_{k>=1} (-1)^(k+1) * A(x^k) * (3*x)^k/k ).at n=7A363442