# A052201 (b-file synthesized from sequence entry) 1 4 2 15 3 48 4 175 5 816 6 4851 7 34960 8 292743 9 2774040 10 29251651 11 339184776 12 4285584615 13 58571107168 14 860622082035 15 13525670637216 16 226358825764711 17 4018390654376520 18 75413358213752643 19 1491684815796629080 20 31014754853346045831 21 676190458445520562896