# A103353 (b-file synthesized from sequence entry) 1 1 2 2 3 20 4 512 5 25392 6 2093472 7 260555392 8 45819233280 9 10849051434240 10 3334632688448000 11 1292876470540099584 12 617862114722159788032 13 357118557050589336432640 14 245715466325821945360588800 15 198568949299946066906578944000 16 186309450278791634742517692366848