26848domain: NAppears in sequencesa(n) = 839*n.at n=32A135639Number of compositions of n where the difference between largest and smallest parts equals 4 and adjacent parts are unequal.at n=17A214273The second Zagreb index of the Aztec diamond AZ(n) (see the Ramanes et al. reference, Theorem 2.2).at n=19A292345