# A087223 (b-file synthesized from sequence entry) 0 1 1 2 2 5 3 14 4 36 5 96 6 254 7 676 8 1792 9 4756 10 12621 11 33490 12 88868 13 235818 14 625764 15 1660510 16 4406296 17 11692452 18 31026836 19 82332140 20 218474784 21 579739960 22 1538385398 23 4082226194 24 10832507040 25 28744906148 26 76276860598 27 202406625820