# A151417 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 14 5 40 6 122 7 380 8 1217 9 3967 10 13137 11 44053 12 149321 13 510735 14 1760687 15 6111171 16 21338857 17 74906438 18 264192659 19 935757437 20 3327107090 21 11870683108 22 42486960839 23 152506832992 24 548875377127 25 1980241926132 26 7160483990345 27 25946243999559 28 94199923539220 29 342620238726110 30 1248274347651947