87084domain: NAppears in sequencesProduct L(n)*L_4(n), where L(n) are Lucas numbers and L_4(n) are Lucas 4-step numbers.at n=10A106627Number of n-node rooted trees with a forbidden limb of length 7.at n=14A255637Number of 4-cycles in the n X n black bishop graph.at n=18A289162