# A100691 (b-file synthesized from sequence entry) 0 1 1 4 2 12 3 30 4 70 5 158 6 352 7 780 8 1724 9 3806 10 8398 11 18526 12 40864 13 90132 14 198796 15 438462 16 967062 17 2132926 18 4704320 19 10375708 20 22884348 21 50473022 22 111321758 23 245527870 24 541528768 25 1194379300 26 2634286476 27 5810101726 28 12814582758