# A305544 (b-file synthesized from sequence entry) 1 0 2 0 3 0 4 0 5 12 6 150 7 1200 8 7845 9 46280 10 254676 11 1344900 12 6892425 13 34646220 14 171715050 15 843004688 16 4110478470 17 19950471120 18 96525524140 19 466068873900 20 2247609721431 21 10832163963860 22 52194011649150 23 251522234238000 24 1212501695554920 25 5848043487355752 26 28223528190496380 27 136307124614215660 28 658800774340433025 29 3186621527711606940