# A120709 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 6 4 8 5 120 6 18480 7 314954640 8 29650259293200 9 806144692105283180937910919057361600 10 116647824244848662624579303522985859096483200 11 3116996669196650347010384586809853826278378997194387292312487616560888473194736151916402811882584000