# A150528 (b-file synthesized from sequence entry) 0 1 1 2 2 7 3 25 4 105 5 430 6 1917 7 8344 8 38339 9 172896 10 808947 11 3725645 12 17647275 13 82496002 14 394115323 15 1862212671 16 8953469157 17 42647136320 18 206057059233 19 987669413703 20 4790583308431 21 23076758351160 22 112282290880467 23 543068170841868 24 2649172135026177 25 12855938931981320 26 62848396027216011 27 305844516598799957