# A005949 (b-file synthesized from sequence entry) 0 0 1 10 2 120 3 1335 4 15708 5 200610 6 2790510 7 42159117 8 688622328 9 12101137137 10 227715010610 11 4568825493485 12 97357110723876 13 2195590326037459 14 52236953438239276 15 1307388516417151770 16 34332703353547941888 17 943774667840796564132