# A053022 (b-file synthesized from sequence entry) 2 1 3 1 4 3 5 9 6 30 7 107 8 396 9 1506 10 5848 11 23087 12 92381 13 373830 14 1527192 15 6290054 16 26090780 17 108895558 18 456992576 19 1927176941 20 8162557837 21 34708427777 22 148110582311 23 634074235584 24 2722547715302 25 11721572763762 26 50591504811439