# A006687 (b-file synthesized from sequence entry) 1 241 2 5521 3 6481 4 51361 5 346561 6 380881 7 390001 8 1678321 9 4332721 10 4654801 11 5576881 12 12707521 13 39336721 14 41432641 15 42942001 16 99990001 17 167948881 18 184970641 19 197063761 20 205598881