# A354588 (b-file synthesized from sequence entry) 0 1 1 4 2 27 3 226 4 2116 5 21218 6 222851 7 2420134 8 26954622 9 306203536 10 3534170486 11 41326973520 12 488562349730 13 5829471835390 14 70112478797987 15 849110215237094 16 10345827793291654 17 126734013316914248 18 1559884942820510474 19 19281814963272771308 20 239263099541276559360 21 2979328903819471935332