# A205976 (b-file synthesized from sequence entry) 0 1 1 4 2 12 3 32 4 84 5 120 6 384 7 52 8 1260 9 1768 10 3960 11 4272 12 16128 13 13048 14 4524 15 58560 16 122388 17 114984 18 403104 19 334480 20 1136520 21 175136 22 2550384 23 2751072 24 11128320 25 9303100 26 20394024 27 31426880 28 8898708 29 61707480 30 239627520 31 172322432 32 548933868 33 676718976 34 1231823592