# A006299 (b-file synthesized from sequence entry) 4 21 5 483 6 15018 7 258972 8 5554188 9 85421118 10 1558792200 11 22555934280 12 375708427812 13 5235847653036 14 82234427131416 15 1117259292848016 16 16842445235560944 17 224686278407291148 18 3286157560248860532 19 43241609165618454096 20 617910462111714896820