# A014711 (b-file synthesized from sequence entry) 0 1 1 0 2 0 3 256 4 2016 5 9216 6 32768 7 96768 8 246240 9 563200 10 1179648 11 2292480 12 4214400 13 7382016 14 12386304 15 20110848 16 31617504 17 48273408 18 72089600 19 105166080 20 150424128 21 211988480 22 293437440 23 400559616