# A371496 (b-file synthesized from sequence entry) 0 1 1 4 2 22 3 156 4 1233 5 10420 6 92120 7 841376 8 7876616 9 75177492 10 728784802 11 7156081536 12 71024862452 13 711383912672 14 7181295333306 15 72989746391780 16 746308443708928 17 7671359593228624 18 79226966456758424 19 821691132077059740 20 8554576791134761387