# A043553 (b-file synthesized from sequence entry) 1 1 2 7 3 43 4 250 5 1420 6 7990 7 44800 8 250900 9 1404700 10 7864000 11 44026000 12 246481000 13 1379950000 14 7725850000 15 43254430000 16 242167300000 17 1355815600000 18 7590769900000 19 42498250000000 20 237933871000000 21 1332114307000000