# A215397 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 3 5 6 6 26 7 84 8 324 9 1170 10 4412 11 16313 12 61138 13 227383 14 849667 15 3168419 16 11831104 17 44144206 18 164792736 19 615027929 20 2295714687