# A077048 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 6 4 44 5 350 6 4292 7 57036 8 996088 9 18661152 10 424241102 11 10266964015 12 287927722315 13 8541887839459 14 285144784116376 15 10016752944160536 16 388044155110294856 17 15749295719801313452 18 694726457246902921502