# A357785 (b-file synthesized from sequence entry) 1 1 2 1 3 4 4 15 5 65 6 291 7 1356 8 6474 9 31555 10 156315 11 784924 12 3986534 13 20444676 14 105728100 15 550735400 16 2886924190 17 15217019595 18 80600822575 19 428766983300 20 2289637381800 21 12268642450420 22 65941128441080 23 355396218177760 24 1920215555772550 25 10398415258863275