# A187998 (b-file synthesized from sequence entry) 1 1 2 6 3 9 4 46 5 117 6 636 7 2596 8 13343 9 66452 10 354806 11 1898800 12 10452050 13 58080269 14 327389928 15 1863061322 16 10707246833 17 62028855007 18 362078074528 19 2127680924575 20 12580327500008 21 74800656700824 22 447053889525102 23 2684568476124840 24 16191874238303244