# A368283 (b-file synthesized from sequence entry) 0 1 1 3 2 11 3 52 4 320 5 2486 6 23402 7 258252 8 3263528 9 46433648 10 734322672 11 12776283136 12 242519067056 13 4987324250416 14 110454579648688 15 2621008072506592 16 66341399843669760 17 1784150447268259456 18 50804574646886197888 19 1527058892582680257024