# A129324 (b-file synthesized from sequence entry) 0 0 1 0 2 1 3 6 4 36 5 220 6 1410 7 9534 8 68040 9 511704 10 4046310 11 33560010 12 291244668 13 2638581972 14 24901833866 15 244333004790 16 2487900487440 17 26245651191600 18 286408960814862 19 3228529392965250 20 37544229610105220 21 449858650676764140