# A320350 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 20 4 148 5 1384 6 15728 7 207696 8 3094152 9 51423288 10 945943512 11 19083180192 12 418550811600 13 9907493349168 14 251588827187280 15 6820899616891008 16 196645361557479552 17 6007407711127690752 18 193842462200078260224 19 6586904673329133618432 20 235079477736802622742528 21 8790132360155070084076800