# A012338 (b-file synthesized from sequence entry) 0 1 1 0 2 12 3 0 4 10640 5 120960 6 74771136 7 4123159040 8 2129817514240 9 315733300850688 10 176225504731384832 11 52096908207506505728 12 34345862831326069035008 13 16865198263103149299957760