# A149186 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 10 4 36 5 125 6 454 7 1722 8 6609 9 25843 10 102590 11 411104 12 1663187 13 6782912 14 27831566 15 114882503 16 476493101 17 1985031001 18 8300902795 19 34833257984 20 146612269660 21 618823561050 22 2618412456313 23 11104706758264 24 47192773402321 25 200945045039469 26 857117045058559 27 3661934564079485