# A148739 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 7 4 25 5 86 6 342 7 1382 8 5856 9 25260 10 111301 11 497087 12 2247763 13 10267545 14 47299472 15 219526072 16 1025314405 17 4815497410 18 22726304664 19 107713530687 20 512449081616 21 2446184163135 22 11711950445834 23 56225920974939 24 270579932260223 25 1304982830765365 26 6306323693669719 27 30530398362465194