# A149323 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 12 4 37 5 152 6 574 7 2069 8 8899 9 35891 10 140144 11 615525 12 2574434 13 10492758 14 46743782 15 200030677 16 837407785 17 3767614082 18 16377824578 19 69844474502 20 316532390515 21 1391809504822 22 6016378322607 23 27419222675191 24 121620817600079 25 531194563076276 26 2431701864824115 27 10860600611853955