# A094287 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 9 5 21 6 51 7 127 8 323 9 835 10 2188 11 5798 12 15510 13 41822 14 113531 15 309937 16 850118 17 2340918 18 6466953 19 17913087 20 49726649 21 138287113 22 385126811 23 1073832695 24 2996974774 25 8370739326 26 23394528640 27 65415732100 28 182989086965 29 512046072481 30 1433197869570