# A140991 (b-file synthesized from sequence entry) 0 0 1 1 2 3 3 1 4 5 5 7 6 27 7 61 8 153 9 331 10 719 11 1489 12 3069 13 6223 14 12579 15 25285 16 50753 17 101683 18 203607 19 407449 20 815205 21 1630711 22 3261803 23 6523981 24 13048425 25 26097307 26 52195167 27 104390881 28 208782413 29 417565471 30 835131699 31 1670264149