# A131351 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 9 5 24 6 77 7 295 8 1329 9 6924 10 41030 11 272271 12 1996406 13 16000511 14 138953665 15 1298206570 16 12969761907 17 137846434950 18 1551712558368 19 18429620298121 20 230175973108212 21 3014142623764514 22 41275488455847862 23 589698136493691293