# A149756 (b-file synthesized from sequence entry) 0 1 1 1 2 5 3 17 4 85 5 329 6 1645 7 6913 8 34565 9 152729 10 763645 11 3482097 12 17410485 13 81061001 14 405305005 15 1914744673 16 9573723365 17 45711939705 18 228559698525 19 1100105774033 20 5500528870165 21 26640170717033 22 133200853585165 23 648290412642625 24 3241452063213125 25 15838421978898265 26 79192109894491325