# A291593 (b-file synthesized from sequence entry) 1 1 2 6 3 397 4 64627 5 33548446 6 68719441230 7 562949953224709 8 18446744073708514623 9 2417851639229258344134994 10 1267650600228229401496677070990 11 2658455991569831745807614120434011325 12 22300745198530623141535718272648360902487971