# A028213 (b-file synthesized from sequence entry) 0 1 1 35 2 773 3 13783 4 216909 5 3146703 6 43129381 7 567128471 8 7227535997 9 89900761951 10 1097000610069 11 13181200344039 12 156403487677165 13 1836701044549679 14 21383695384607237 15 247159815109688887