# A148366 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 15 5 49 6 178 7 663 8 2599 9 10464 10 43281 11 182870 12 786326 13 3432964 14 15178764 15 67856987 16 306252851 17 1393718374 18 6389136297 19 29478905335 20 136795502578 21 638051453583 22 2989741310540 23 14067166927596 24 66435732371659 25 314823825304590 26 1496481124834255 27 7133380580616379 28 34090715666725451