# A124531 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 16 5 62 6 274 7 1332 8 6978 9 38873 10 228090 11 1399625 12 8933506 13 59066261 14 403241292 15 2835267821 16 20490128048 17 151951503074 18 1154770194362 19 8983396031267 20 71473650532630 21 581142591346325 22 4825842125683150