60382domain: NAppears in sequencesStructured triakis icosahedral numbers (vertex structure 4).at n=18A100172Central coefficients of the Riordan matrix (1/(1-3*x^2),x/(1-x)) (A191582).at n=9A191585Number of length 2+2 0..n arrays with some pair in every consecutive three terms totalling exactly n.at n=36A245871