# A337003 (b-file synthesized from sequence entry) 1 1 2 4 3 18 4 32 5 250 6 72 7 3430 8 6400 9 34506 10 29000 11 705430 12 1254816 13 10400598 14 8281392 15 86567400 16 300533760 17 2333606218 18 2172355848 19 35345263798 20 68442424000 21 332533406646 22 554415527952 23 8233430727598 24 12704658876288 25 105035376968750