# A017405 (b-file synthesized from sequence entry) 0 1 1 248832 2 6436343 3 45435424 4 184528125 5 550731776 6 1350125107 7 2887174368 8 5584059449 9 10000000000 10 16850581551 11 27027081632 12 41615795893 13 61917364224 14 89466096875 15 126049300576 16 173726604657